1 <?xml version="1.0" encoding="UTF-8"?>
3 <sect1 id="zend.gdata.youtube">
4 <title>Using the YouTube Data API</title>
7 The YouTube Data <acronym>API</acronym> offers read and write access to YouTube's content.
8 Users can perform unauthenticated requests to Google Data feeds to
9 retrieve feeds of popular videos, comments, public information about
10 YouTube user profiles, user playlists, favorites, subscriptions and so on.
14 For more information on the YouTube Data <acronym>API</acronym>, please refer
15 to the official <ulink
16 url="http://code.google.com/apis/youtube/developers_guide_php.html"><acronym>PHP</acronym>
17 Developer's Guide</ulink> on code.google.com.
20 <sect2 id="zend.gdata.youtube.authentication">
21 <title>Authentication</title>
24 The YouTube Data <acronym>API</acronym> allows read-only access to public data, which
25 does not require authentication. For any write requests, a user
26 needs to authenticate either using ClientLogin or AuthSub authentication. Please refer
28 url="http://code.google.com/apis/youtube/developers_guide_php.html#Authentication">Authentication
29 section in the <acronym>PHP</acronym> Developer's Guide</ulink> for more detail.
33 <sect2 id="zend.gdata.youtube.developer_key">
34 <title>Developer Keys and Client ID</title>
37 A developer key identifies the YouTube developer that is submitting
38 an <acronym>API</acronym> request. A client ID identifies your application for logging
39 and debugging purposes. Please visit <ulink
40 url="http://code.google.com/apis/youtube/dashboard/">http://code.google.com/apis/youtube/dashboard/</ulink>
41 to obtain a developer key and client ID. The example below demonstrates how to pass the
42 developer key and client ID to the <ulink
43 url="http://framework.zend.com/apidoc/core/Zend_Gdata/Zend_Gdata_YouTube.html">Zend_Gdata_YouTube</ulink>
47 <example id="zend.gdata.youtube.developer_key.example">
48 <title>Passing a Developer Key and ClientID to Zend_Gdata_YouTube</title>
50 <programlisting language="php"><![CDATA[
51 $yt = new Zend_Gdata_YouTube($httpClient,
59 <sect2 id="zend.gdata.youtube.videos">
60 <title>Retrieving public video feeds</title>
63 The YouTube Data <acronym>API</acronym> provides numerous feeds that return a list of
64 videos, such as standard feeds, related videos, video responses,
65 user's uploads, and user's favorites. For example, the
66 user's uploads feed returns all videos uploaded by a specific user. See the <ulink
67 url="http://code.google.com/apis/youtube/reference.html#Video_Feeds">YouTube
68 <acronym>API</acronym> reference guide</ulink> for a detailed list of available
72 <sect3 id="zend.gdata.youtube.videos.searching">
73 <title>Searching for videos by metadata</title>
76 You can retrieve a list of videos that match specified
77 search criteria, using the YouTubeQuery class. The following query
78 looks for videos which contain the word "cat" in their
79 metadata, starting with the 10th video and displaying 20
80 videos per page, ordered by the view count.
83 <example id="zend.gdata.youtube.videos.searching.example">
84 <title>Searching for videos</title>
86 <programlisting language="php"><![CDATA[
87 $yt = new Zend_Gdata_YouTube();
88 $query = $yt->newVideoQuery();
89 $query->videoQuery = 'cat';
90 $query->startIndex = 10;
91 $query->maxResults = 20;
92 $query->orderBy = 'viewCount';
94 echo $query->queryUrl . "\n";
95 $videoFeed = $yt->getVideoFeed($query);
97 foreach ($videoFeed as $videoEntry) {
98 echo "---------VIDEO----------\n";
99 echo "Title: " . $videoEntry->getVideoTitle() . "\n";
100 echo "\nDescription:\n";
101 echo $videoEntry->getVideoDescription();
108 For more details on the different query parameters, please refer to the <ulink
109 url="http://code.google.com/apis/youtube/reference.html#Searching_for_videos">
110 Reference Guide</ulink>. The available helper functions in <ulink
111 url="http://framework.zend.com/apidoc/core/Zend_Gdata/Zend_Gdata_YouTube_VideoQuery.html"><classname>Zend_Gdata_YouTube_VideoQuery</classname></ulink>
112 for each of these parameters are described in more detail in the <ulink
113 url="http://code.google.com/apis/youtube/developers_guide_php.html#SearchingVideos">PHP
114 Developer's Guide</ulink>.
118 <sect3 id="zend.gdata.youtube.videos.searchingcategories">
119 <title>Searching for videos by categories and tags/keywords</title>
122 Searching for videos in specific categories is done by generating a <ulink
123 url="http://code.google.com/apis/youtube/reference.html#Category_search">specially
124 formatted <acronym>URL</acronym></ulink>. For example, to search for
125 comedy videos which contain the keyword dog:
128 <example id="zend.gdata.youtube.videos.searchingcategories.example">
129 <title>Searching for videos in specific categories</title>
131 <programlisting language="php"><![CDATA[
132 $yt = new Zend_Gdata_YouTube();
133 $query = $yt->newVideoQuery();
134 $query->category = 'Comedy/dog';
136 echo $query->queryUrl . "\n";
137 $videoFeed = $yt->getVideoFeed($query);
142 <sect3 id="zend.gdata.youtube.videos.standard">
143 <title>Retrieving standard feeds</title>
146 The YouTube Data <acronym>API</acronym> has a number of <ulink
147 url="http://code.google.com/apis/youtube/reference.html#Standard_feeds">standard
148 feeds</ulink>. These standard feeds can be retrieved as <ulink
149 url="http://framework.zend.com/apidoc/core/Zend_Gdata/Zend_Gdata_YouTube_VideoFeed.html">Zend_Gdata_YouTube_VideoFeed</ulink>
150 objects using the specified <acronym>URL</acronym>s, using the predefined constants
152 url="http://framework.zend.com/apidoc/core/Zend_Gdata/Zend_Gdata_YouTube.html">Zend_Gdata_YouTube</ulink>
153 class (Zend_Gdata_YouTube::STANDARD_TOP_RATED_URI for example) or
154 using the predefined helper methods (see code listing below).
158 To retrieve the top rated videos using the helper method:
161 <example id="zend.gdata.youtube.videos.standard.example-1">
162 <title>Retrieving a standard video feed</title>
164 <programlisting language="php"><![CDATA[
165 $yt = new Zend_Gdata_YouTube();
166 $videoFeed = $yt->getTopRatedVideoFeed();
171 There are also query parameters to specify the time period
172 over which the standard feed is computed.
176 For example, to retrieve the top rated videos for today:
179 <example id="zend.gdata.youtube.videos.standard.example-2">
180 <title>Using a Zend_Gdata_YouTube_VideoQuery to Retrieve Videos</title>
182 <programlisting language="php"><![CDATA[
183 $yt = new Zend_Gdata_YouTube();
184 $query = $yt->newVideoQuery();
185 $query->setTime('today');
186 $videoFeed = $yt->getTopRatedVideoFeed($query);
191 Alternatively, you could just retrieve the feed using the
192 <acronym>URL</acronym>:
195 <example id="zend.gdata.youtube.videos.standard.example-3">
196 <title>Retrieving a video feed by URL</title>
198 <programlisting language="php"><![CDATA[
199 $yt = new Zend_Gdata_YouTube();
200 $url = 'http://gdata.youtube.com/feeds/standardfeeds/top_rated?time=today'
201 $videoFeed = $yt->getVideoFeed($url);
206 <sect3 id="zend.gdata.youtube.videos.user">
207 <title>Retrieving videos uploaded by a user</title>
210 You can retrieve a list of videos uploaded by a particular user
211 using a simple helper method. This example retrieves videos
212 uploaded by the user 'liz'.
215 <example id="zend.gdata.youtube.videos.user.example">
216 <title>Retrieving videos uploaded by a specific user</title>
218 <programlisting language="php"><![CDATA[
219 $yt = new Zend_Gdata_YouTube();
220 $videoFeed = $yt->getUserUploads('liz');
225 <sect3 id="zend.gdata.youtube.videos.favorites">
226 <title>Retrieving videos favorited by a user</title>
229 You can retrieve a list of a user's favorite videos
230 using a simple helper method. This example retrieves videos
231 favorited by the user 'liz'.
234 <example id="zend.gdata.youtube.videos.favorites.example">
235 <title>Retrieving a user's favorite videos</title>
237 <programlisting language="php"><![CDATA[
238 $yt = new Zend_Gdata_YouTube();
239 $videoFeed = $yt->getUserFavorites('liz');
244 <sect3 id="zend.gdata.youtube.videos.responses">
245 <title>Retrieving video responses for a video</title>
248 You can retrieve a list of a video's video responses
249 using a simple helper method. This example retrieves video
250 response for a video with the ID 'abc123813abc'.
253 <example id="zend.gdata.youtube.videos.responses.example">
254 <title>Retrieving a feed of video responses</title>
256 <programlisting language="php"><![CDATA[
257 $yt = new Zend_Gdata_YouTube();
258 $videoFeed = $yt->getVideoResponseFeed('abc123813abc');
264 <sect2 id="zend.gdata.youtube.comments">
265 <title>Retrieving video comments</title>
268 The comments for each YouTube video can be retrieved in
269 several ways. To retrieve the comments for the video with
270 the ID 'abc123813abc', use the following code:
273 <example id="zend.gdata.youtube.videos.comments.example-1">
274 <title>Retrieving a feed of video comments from a video ID</title>
276 <programlisting language="php"><![CDATA[
277 $yt = new Zend_Gdata_YouTube();
278 $commentFeed = $yt->getVideoCommentFeed('abc123813abc');
280 foreach ($commentFeed as $commentEntry) {
281 echo $commentEntry->title->text . "\n";
282 echo $commentEntry->content->text . "\n\n\n";
288 Comments can also be retrieved for a video if you have a copy of the <ulink
289 url="http://framework.zend.com/apidoc/core/Zend_Gdata/Zend_Gdata_YouTube_VideoEntry.html">Zend_Gdata_YouTube_VideoEntry</ulink>
293 <example id="zend.gdata.youtube.videos.comments.example-2">
294 <title>Retrieving a Feed of Video Comments from a Zend_Gdata_YouTube_VideoEntry</title>
296 <programlisting language="php"><![CDATA[
297 $yt = new Zend_Gdata_YouTube();
298 $videoEntry = $yt->getVideoEntry('abc123813abc');
299 // we don't know the video ID in this example, but we do have the URL
300 $commentFeed = $yt->getVideoCommentFeed(null,
301 $videoEntry->comments->href);
306 <sect2 id="zend.gdata.youtube.playlists">
307 <title>Retrieving playlist feeds</title>
310 The YouTube Data <acronym>API</acronym> provides information about users, including
311 profiles, playlists, subscriptions, and more.
314 <sect3 id="zend.gdata.youtube.playlists.user">
315 <title>Retrieving the playlists of a user</title>
318 The library provides a helper method to retrieve
319 the playlists associated with a given user. To retrieve the
320 playlists for the user 'liz':
323 <example id="zend.gdata.youtube.playlists.user.example">
324 <title>Retrieving the playlists of a user</title>
326 <programlisting language="php"><![CDATA[
327 $yt = new Zend_Gdata_YouTube();
328 $playlistListFeed = $yt->getPlaylistListFeed('liz');
330 foreach ($playlistListFeed as $playlistEntry) {
331 echo $playlistEntry->title->text . "\n";
332 echo $playlistEntry->description->text . "\n";
333 echo $playlistEntry->getPlaylistVideoFeedUrl() . "\n\n\n";
339 <sect3 id="zend.gdata.youtube.playlists.special">
340 <title>Retrieving a specific playlist</title>
343 The library provides a helper method to retrieve
344 the videos associated with a given playlist. To retrieve the
345 playlists for a specific playlist entry:
348 <example id="zend.gdata.youtube.playlists.special.example">
349 <title>Retrieving a specific playlist</title>
351 <programlisting language="php"><![CDATA[
352 $feedUrl = $playlistEntry->getPlaylistVideoFeedUrl();
353 $playlistVideoFeed = $yt->getPlaylistVideoFeed($feedUrl);
359 <sect2 id="zend.gdata.youtube.subscriptions">
360 <title>Retrieving a list of a user's subscriptions</title>
363 A user can have several types of subscriptions: channel
364 subscription, tag subscription, or favorites subscription. A <ulink
365 url="http://framework.zend.com/apidoc/core/Zend_Gdata/Zend_Gdata_YouTube_SubscriptionEntry.html">Zend_Gdata_YouTube_SubscriptionEntry</ulink>
366 is used to represent individual subscriptions.
370 To retrieve all subscriptions for the user 'liz':
373 <example id="zend.gdata.youtube.subscriptions.example">
374 <title>Retrieving all subscriptions for a user</title>
376 <programlisting language="php"><![CDATA[
377 $yt = new Zend_Gdata_YouTube();
378 $subscriptionFeed = $yt->getSubscriptionFeed('liz');
380 foreach ($subscriptionFeed as $subscriptionEntry) {
381 echo $subscriptionEntry->title->text . "\n";
387 <sect2 id="zend.gdata.youtube.profile">
388 <title>Retrieving a user's profile</title>
391 You can retrieve the public profile information
392 for any YouTube user. To retrieve the profile
396 <example id="zend.gdata.youtube.profile.example">
397 <title>Retrieving a user's profile</title>
399 <programlisting language="php"><![CDATA[
400 $yt = new Zend_Gdata_YouTube();
401 $userProfile = $yt->getUserProfile('liz');
402 echo "username: " . $userProfile->username->text . "\n";
403 echo "age: " . $userProfile->age->text . "\n";
404 echo "hometown: " . $userProfile->hometown->text . "\n";
409 <sect2 id="zend.gdata.youtube.uploads">
410 <title>Uploading Videos to YouTube</title>
413 Please make sure to review the diagrams in the <ulink
414 url="http://code.google.com/apis/youtube/developers_guide_protocol.html#Process_Flows_for_Uploading_Videos">protocol
415 guide</ulink> on code.google.com for a high-level
416 overview of the upload process. Uploading videos can be done in one of
417 two ways: either by uploading the video directly or by sending just the video
418 meta-data and having a user upload the video through an <acronym>HTML</acronym> form.
422 In order to upload a video directly, you must first construct a new <ulink
423 url="http://framework.zend.com/apidoc/core/Zend_Gdata/Zend_Gdata_YouTube_VideoEntry.html">Zend_Gdata_YouTube_VideoEntry</ulink>
424 object and specify some required meta-data. The following example shows uploading the
425 Quicktime video "mytestmovie.mov" to YouTube with the following properties:
428 <table id="zend.gdata.youtube.uploads.metadata">
429 <title>Metadata used in the code-sample below</title>
431 <tgroup cols="2" align="left" colsep="1" rowsep="1">
434 <entry>Property</entry>
442 <entry>My Test Movie</entry>
446 <entry>Category</entry>
451 <entry>Keywords</entry>
452 <entry>cars, funny</entry>
456 <entry>Description</entry>
457 <entry>My description</entry>
461 <entry>Filename</entry>
462 <entry>mytestmovie.mov</entry>
466 <entry>File <acronym>MIME</acronym> type</entry>
467 <entry>video/quicktime</entry>
471 <entry>Video private?</entry>
472 <entry><constant>FALSE</constant></entry>
476 <entry>Video location</entry>
477 <entry>37, -122 (lat, long)</entry>
481 <entry>Developer Tags</entry>
482 <entry>mydevelopertag, anotherdevelopertag</entry>
489 The code below creates a blank <ulink
490 url="http://framework.zend.com/apidoc/core/Zend_Gdata/Zend_Gdata_YouTube_VideoEntry.html">Zend_Gdata_YouTube_VideoEntry</ulink>
491 to be uploaded. A <ulink
492 url="http://framework.zend.com/apidoc/core/Zend_Gdata/Zend_Gdata_App_MediaFileSource.html">Zend_Gdata_App_MediaFileSource</ulink>
493 object is then used to hold the actual video file. Under the hood, the <ulink
494 url="http://framework.zend.com/apidoc/core/Zend_Gdata/Zend_Gdata_YouTube_Extension_MediaGroup.html">Zend_Gdata_YouTube_Extension_MediaGroup</ulink>
495 object is used to hold all of the video's meta-data. Our helper methods detailed below
496 allow you to just set the video meta-data without having to worry about the media group
497 object. The $uploadUrl is the location where the new entry gets posted to.
498 This can be specified either with the $userName of the
499 currently authenticated user, or, alternatively, you can simply use the
500 string 'default' to refer to the currently authenticated user.
503 <example id="zend.gdata.youtube.uploads.example">
504 <title>Uploading a video</title>
506 <programlisting language="php"><![CDATA[
507 $yt = new Zend_Gdata_YouTube($httpClient);
508 $myVideoEntry = new Zend_Gdata_YouTube_VideoEntry();
510 $filesource = $yt->newMediaFileSource('mytestmovie.mov');
511 $filesource->setContentType('video/quicktime');
512 $filesource->setSlug('mytestmovie.mov');
514 $myVideoEntry->setMediaSource($filesource);
516 $myVideoEntry->setVideoTitle('My Test Movie');
517 $myVideoEntry->setVideoDescription('My Test Movie');
518 // Note that category must be a valid YouTube category !
519 $myVideoEntry->setVideoCategory('Comedy');
521 // Set keywords, note that this must be a comma separated string
522 // and that each keyword cannot contain whitespace
523 $myVideoEntry->SetVideoTags('cars, funny');
525 // Optionally set some developer tags
526 $myVideoEntry->setVideoDeveloperTags(array('mydevelopertag',
527 'anotherdevelopertag'));
529 // Optionally set the video's location
530 $yt->registerPackage('Zend_Gdata_Geo');
531 $yt->registerPackage('Zend_Gdata_Geo_Extension');
532 $where = $yt->newGeoRssWhere();
533 $position = $yt->newGmlPos('37.0 -122.0');
534 $where->point = $yt->newGmlPoint($position);
535 $myVideoEntry->setWhere($where);
537 // Upload URI for the currently authenticated user
539 'http://uploads.gdata.youtube.com/feeds/users/default/uploads';
541 // Try to upload the video, catching a Zend_Gdata_App_HttpException
542 // if availableor just a regular Zend_Gdata_App_Exception
545 $newEntry = $yt->insertEntry($myVideoEntry,
547 'Zend_Gdata_YouTube_VideoEntry');
548 } catch (Zend_Gdata_App_HttpException $httpException) {
549 echo $httpException->getRawResponseBody();
550 } catch (Zend_Gdata_App_Exception $e) {
551 echo $e->getMessage();
557 To upload a video as private, simply use: $myVideoEntry->setVideoPrivate(); prior to
558 performing the upload. $videoEntry->isVideoPrivate() can be used to check whether a
559 video entry is private or not.
563 <sect2 id="zend.gdata.youtube.uploads.browser">
564 <title>Browser-based upload</title>
567 Browser-based uploading is performed almost identically to direct uploading,
568 except that you do not attach a <ulink
569 url="http://framework.zend.com/apidoc/core/Zend_Gdata/Zend_Gdata_App_MediaFileSource.html">Zend_Gdata_App_MediaFileSource</ulink>
571 url="http://framework.zend.com/apidoc/core/Zend_Gdata/Zend_Gdata_YouTube_VideoEntry.html">Zend_Gdata_YouTube_VideoEntry</ulink>
572 you are constructing. Instead you simply submit all of your video's meta-data to receive
573 back a token element which can be used to construct an <acronym>HTML</acronym> upload
577 <example id="zend.gdata.youtube.uploads.browser.example-1">
578 <title>Browser-based upload</title>
580 <programlisting language="php"><![CDATA[
581 $yt = new Zend_Gdata_YouTube($httpClient);
583 $myVideoEntry= new Zend_Gdata_YouTube_VideoEntry();
584 $myVideoEntry->setVideoTitle('My Test Movie');
585 $myVideoEntry->setVideoDescription('My Test Movie');
587 // Note that category must be a valid YouTube category
588 $myVideoEntry->setVideoCategory('Comedy');
589 $myVideoEntry->SetVideoTags('cars, funny');
591 $tokenHandlerUrl = 'http://gdata.youtube.com/action/GetUploadToken';
592 $tokenArray = $yt->getFormUploadToken($myVideoEntry, $tokenHandlerUrl);
593 $tokenValue = $tokenArray['token'];
594 $postUrl = $tokenArray['url'];
599 The above code prints out a link and a token that is used to construct an
600 <acronym>HTML</acronym> form to display in the user's browser. A simple example form is
601 shown below with $tokenValue representing the content of the returned token element,
602 as shown being retrieved from $myVideoEntry above. In order for the user
603 to be redirected to your website after submitting the form, make sure to
604 append a $nextUrl parameter to the $postUrl above, which functions in the
605 same way as the $next parameter of an AuthSub link. The only difference is
606 that here, instead of a single-use token, a status and an id variable are
607 returned in the <acronym>URL</acronym>.
610 <example id="zend.gdata.youtube.uploads.browser.example-2">
611 <title>Browser-based upload: Creating the HTML form</title>
613 <programlisting language="php"><![CDATA[
614 // place to redirect user after upload
615 $nextUrl = 'http://mysite.com/youtube_uploads';
617 $form = '<form action="'. $postUrl .'?nexturl='. $nextUrl .
618 '" method="post" enctype="multipart/form-data">'.
619 '<input name="file" type="file"/>'.
620 '<input name="token" type="hidden" value="'. $tokenValue .'"/>'.
621 '<input value="Upload Video File" type="submit" />'.
627 <sect2 id="zend.gdata.youtube.uploads.status">
628 <title>Checking upload status</title>
631 After uploading a video, it will immediately be visible in an
632 authenticated user's uploads feed. However, it will not be public on
633 the site until it has been processed. Videos that have been rejected or
634 failed to upload successfully will also only be in the authenticated
635 user's uploads feed. The following code checks the status of a <ulink
636 url="http://framework.zend.com/apidoc/core/Zend_Gdata/Zend_Gdata_YouTube_VideoEntry.html">Zend_Gdata_YouTube_VideoEntry</ulink>
637 to see if it is not live yet or if it has been rejected.
640 <example id="zend.gdata.youtube.uploads.status.example">
641 <title>Checking video upload status</title>
643 <programlisting language="php"><![CDATA[
645 $control = $videoEntry->getControl();
646 } catch (Zend_Gdata_App_Exception $e) {
647 echo $e->getMessage();
650 if ($control instanceof Zend_Gdata_App_Extension_Control) {
651 if ($control->getDraft() != null &&
652 $control->getDraft()->getText() == 'yes') {
653 $state = $videoEntry->getVideoState();
655 if ($state instanceof Zend_Gdata_YouTube_Extension_State) {
656 print 'Upload status: '
658 .' '. $state->getText();
660 print 'Not able to retrieve the video status information'
661 .' yet. ' . "Please try again shortly.\n";
669 <sect2 id="zend.gdata.youtube.other">
670 <title>Other Functions</title>
673 In addition to the functionality described above, the YouTube <acronym>API</acronym>
674 contains many other functions that allow you to modify video meta-data,
675 delete video entries and use the full range of community features on the site. Some of
676 the community features that can be modified through the <acronym>API</acronym> include:
677 ratings, comments, playlists, subscriptions, user profiles, contacts and messages.
680 Please refer to the full documentation available in the <ulink
681 url="http://code.google.com/apis/youtube/developers_guide_php.html">PHP Developer's
682 Guide</ulink> on code.google.com.