How to retrieve YouTube video information (title, author, etc) by its id using YouTube API

Question

Can anybody suggest how to do it or where to learn about how to do it.

Answer 1

See if this helps:

<script type="text/javascript">
  function youtubeFeedCallback( data )
  {
    document.writeln( '<img src="' + data.entry[ "media$group" ][ "media$thumbnail" ][ 0 ].url + '" width="' + data.entry[ "media$group" ][ "media$thumbnail" ][ 0 ].width + '" height="' + data.entry[ "media$group" ][ "media$thumbnail" ][ 0 ].height + '" alt="Default Thumbnail" align="right"/>' );
    document.writeln( '<b>Title:</b> ' + data.entry[ "title" ].$t + '<br/>' );
    document.writeln( '<b>Author:</b> ' + data.entry[ "author" ][ 0 ].name.$t + '<br/>' );
    document.writeln( '<b>Published:</b> ' + new Date( data.entry[ "published" ].$t.substr( 0, 4 ), data.entry[ "published" ].$t.substr( 5, 2 ) - 1, data.entry[ "published" ].$t.substr( 8, 2 ) ).toLocaleDateString( ) + '<br/>' );
    document.writeln( '<b>Duration:</b> ' + Math.floor( data.entry[ "media$group" ][ "yt$duration" ].seconds / 60 ) + ':' + ( data.entry[ "media$group" ][ "yt$duration" ].seconds % 60 ) + ' (' + data.entry[ "media$group" ][ "yt$duration" ].seconds + ' seconds)<br/>' );
    document.writeln( '<b>Rating:</b> ' + new Number( data.entry[ "gd$rating" ].average ).toFixed( 1 ) + ' out of ' + data.entry[ "gd$rating" ].max + '; ' + data.entry[ "gd$rating" ].numRaters + ' rating(s)' + '<br/>' );
    document.writeln( '<b>Statistics:</b> ' + data.entry[ "yt$statistics" ].favoriteCount + ' favorite(s); ' + data.entry[ "yt$statistics" ].viewCount + ' view(s)' + '<br/>' );
    document.writeln( '<br/>' + data.entry[ "media$group" ][ "media$description" ].$t.replace( /\n/g, '<br/>' ) + '<br/>' );
    document.writeln( '<br/><a href="' + data.entry[ "media$group" ][ "media$player" ].url + '" target="_blank">Watch on YouTube</a>' );
  }
</script>
<script type="text/javascript" src="http://gdata.youtube.com/feeds/api/videos/gzDS-Kfd5XQ?v=2&amp;alt=json-in-script&amp;callback=youtubeFeedCallback"></script>

Code copied from here, jsFiddle Demo

As far as where to learn about how to do it is concerned, have a look at:

• YouTube Data API Protocol Reference Guide
• Retrieving Data for a Single Video
• Understanding Video Feeds and Entries
• JSON/JavaScript Guide

Answer 2

Found it at http://code.google.com/apis/youtube/2.0/developers_guide_protocol.html#Retrieve_video_entry