AS3-youtube-parser-video-link

This AS3 library can parse standard youtube links like https://www.youtube.com/watch?v=QowwaefoCec and will extract different elements of that video like available direct video addresses, video title and video thumbnail. it works with public unrestricted video files only.

I must add that I wrote this library after being inspired by https://github.com/jeckman/YouTube-Downloader

USAGE:

 import com.doitflash.remote.youtube.YouTubeLinkParser;
 import com.doitflash.remote.youtube.YouTubeLinkParserEvent;
 import com.doitflash.remote.youtube.VideoType;
 import com.doitflash.remote.youtube.VideoQuality;
 
 var _ytParser:YouTubeLinkParser = new YouTubeLinkParser();
 _ytParser.addEventListener(YouTubeLinkParserEvent.COMPLETE, onComplete);
 _ytParser.addEventListener(YouTubeLinkParserEvent.ERROR, onError);
 _ytParser.parse("https://www.youtube.com/watch?v=QowwaefoCec");
 
 function onError(e:YouTubeLinkParserEvent):void
 {
     // removing listeners just for clean cosing reasons!
     _ytParser.removeEventListener(YouTubeLinkParserEvent.COMPLETE, onComplete);
     _ytParser.removeEventListener(YouTubeLinkParserEvent.ERROR, onError);
         
     trace("Error: " + e.param.msg);
 }
 
 function onComplete(e:YouTubeLinkParserEvent):void
 {
     // removing listeners just for clean coding reasons!
     _ytParser.removeEventListener(YouTubeLinkParserEvent.COMPLETE, onComplete);
     _ytParser.removeEventListener(YouTubeLinkParserEvent.ERROR, onError);
     
     trace("youTube parse completed...");
     trace("video thumb: " + _ytParser.thumb);
     trace("video title: " + _ytParser.title);
     trace("possible found videos: " + _ytParser.videoFormats.length);
     
     trace("you can only access youtube public videos... no age restriction for example!");
     trace("some video formats may be null so you should check their availablily...");
     trace("to make your job easier, I built another method called getHeaders() which will load video headers for you! 
     you can know the video size using these header information :) ")
     
     // let's find the VideoType.VIDEO_MP4 video format in VideoQuality.MEDIUM for this video
     // NOTICE: you should find your own way of selecting a video format! as different videos may not have all formats or qualities available!
     
     var currVideoData:URLVariables;
     var chosenVideo:String;
     for (var i:int = 0; i < _ytParser.videoFormats.length; i++) 
     {
         currVideoData = _ytParser.videoFormats[i];
         if (currVideoData.type == VideoType.VIDEO_MP4 && currVideoData.quality == VideoQuality.MEDIUM)
         {
             chosenVideo = currVideoData.url;
             break;
         }
     }
     
     _ytParser.addEventListener(YouTubeLinkParserEvent.VIDEO_HEADER_RECEIVED, onHeadersReceived);
     _ytParser.addEventListener(YouTubeLinkParserEvent.VIDEO_HEADER_ERROR, onHeadersError);
     _ytParser.getHeaders(chosenVideo);
 }
 
 function onHeadersError(e:YouTubeLinkParserEvent):void
 {
     _ytParser.removeEventListener(YouTubeLinkParserEvent.VIDEO_HEADER_RECEIVED, onHeadersReceived);
     _ytParser.removeEventListener(YouTubeLinkParserEvent.VIDEO_HEADER_ERROR, onHeadersError);
     
     trace("Error: " + e.param.msg)
 }
 
 function onHeadersReceived(event:YouTubeLinkParserEvent):void
 {
     _ytParser.removeEventListener(YouTubeLinkParserEvent.VIDEO_HEADER_RECEIVED, onHeadersReceived);
     _ytParser.removeEventListener(YouTubeLinkParserEvent.VIDEO_HEADER_ERROR, onHeadersError);
     
     var lng:int = event.param.headers.length;
     var i:int;
     var currHeader:
     
     for (i = 0; i < lng; i++ )
     {
         currHeader = event.param.headers[i];
         trace(currHeader.name + " = " + currHeader.value);
     }
     
     // ok, we are happy! now let's download this video, like any other file you would download:
     download(event.param.url);
 }