javascript - how to check the valid Youtube url using jquery

Question

In Jquery i want to check the specific url from youtube alone and show success status and others i want to skip by stating it as not valid url

var _videoUrl = "youtube.com/watch?v=FhnMNwiGg5M";
if (_videoUrl.contains("youtube.com"))
{
  alert('Valid'); 
} 
else
{ 
  alert('Not Valid');
} 

how to check with contains. or any other option to check the valid youtube url alone.

Answer 1

I found this from the closure library, might be handy:

/**
 * A youtube regular expression matcher. It matches the VIDEOID of URLs like
 * http://www.youtube.com/watch?v=VIDEOID.
 * @type {RegExp}
 * @private
 */
goog.ui.media.YoutubeModel.matcher_ =
    /https?://(?:[a-zA_Z]{2,3}.)?(?:youtube.com/watch?)((?:[wd-\_=]+&(?:amp;)?)*v(?:<[A-Z]+>)?=([0-9a-zA-Z-\_]+))/i;