PHP5

You can retrieve a list of videos that match specified search criteria, using the video feed. The following query looks for videos which contain the word "cat" in their metadata, starting with the 10th video and displaying 20 videos per page, ordered by the view count.

<?php
require_once 'Zend/Loader.php';
Zend_Loader::loadClass('Zend_Gdata_YouTube');

$yt = new Zend_Gdata_YouTube();
$query = $yt->newVideoQuery();
$query->videoQuery = 'cat';
$query->startIndex = 10;
$query->maxResults = 20;
$query->orderBy = 'viewCount';

echo $query->queryUrl . "\n";
$videoFeed = $yt->getVideoFeed($query); 

foreach ($videoFeed as $videoEntry) {
  echo "---------VIDEO----------\n";
  echo "Title: " . $videoEntry->mediaGroup->title->text . "\n";
  echo "\nDescription:\n";
  echo $videoEntry->mediaGroup->description->text;
  echo "\n\n\n";
}
?>

For more details on the different query parameters, please refer to the Reference Guide. There are helper functions in Zend_Gdata_YouTube_VideoQuery for each of these parameters.

Searching for videos in specific categories is done by generating a specially formatted URL. For example, to search for comedy videos which contain the keyword dog:

$yt = new Zend_Gdata_YouTube();
$query = $yt->newVideoQuery();
$query->category = 'Comedy/dog';

echo $query->queryUrl . "\n";
$videoFeed = $yt->getVideoFeed($query); 

The YouTube data API has a number of standard feeds. These standard feeds can be retrieved as Zend_Gdata_YouTube_VideoFeed objects using the specified URLs, but many also have helper methods in Zend_Gdata_YouTube.

To retrieve the top rated videos using the helper method:

$yt = new Zend_Gdata_YouTube();

$videoFeed = $yt->getTopRatedVideoFeed(); 

There are also query parameters to specify the time period over which the standard feed is computed. Only valid with the top_rated and most_viewed standard feeds.

For example, to retrieve the top rated videos for today:

$yt = new Zend_Gdata_YouTube();
$query = $yt->newVideoQuery();
$query->setTime('today');
$videoFeed = $yt->getTopRatedVideoFeed($query); 

Alternatively, you could just retrieve the feed using the URL:

$yt = new Zend_Gdata_YouTube();
$query = $yt->newVideoQuery('http://gdata.youtube.com/feeds/standardfeeds/top_rated');
$query->setTime('today');
$videoFeed = $yt->getVideoFeed($query); 

You can retrieve a list of videos uploaded by a particular user using a simple helper method. This example retrieves videos uploaded by the user 'liz'.

$yt = new Zend_Gdata_YouTube();
$videoFeed = $yt->getUserUploads('liz'); 

You can retrieve a list of a user's favorite videos using a simple helper method. This example retrieves videos favorited by the user 'liz'.

$yt = new Zend_Gdata_YouTube();
$videoFeed = $yt->getUserFavorites('liz'); 

You can retrieve a list of a video's video responses using a simple helper method. This example retrieves video response for a video with the ID 'abc123813abc'.

$yt = new Zend_Gdata_YouTube();
$videoFeed = $yt->getVideoResponseFeed('abc123813abc'); 

The library provides a helper method to retrieve the playlists associated with a given user. To retrieve the playlists for the user 'liz':

$yt = new Zend_Gdata_YouTube();
$playlistListFeed = $yt->getPlaylistListFeed('liz'); 

foreach ($playlistListFeed as $playlistEntry) {
    echo $playlistEntry->title->text . "\n";
    echo $playlistEntry->description->text . "\n";
    echo $playlistEntry->getPlaylistVideoFeedUrl() . "\n\n\n";
} 

The library provides a helper method to retrieve the videos associated with a given playlist. To retrieve the playlists for a specific playlist entry:

$playlistVideoFeed = $yt->getPlaylistVideoFeed($playlistEntry->getPlaylistVideoFeedUrl());