I'm trying to make a site with user-submitted videos from YouTube using a simple form. I'm going to have my users put in their video URL (in a custom field) but then trim it down to only the video ID so that I can have all of the 'embedded players' built into single.php (so from 'http://www.youtube.com/watch?v=dQw4w9WgXcQ' => 'dQw4w9WgXcQ'). I also want that custom field video ID to be used in displaying the video image on my site's homepage using the standard YouTube thumbnail format (http://img.youtube.com/vi/VIDEOID/0.jpg). I know my description isn't too clear, but does anyone have an idea of how I can get this done? I tried looking through WordPress' oEmbed script to see how that works, but couldn't figure it out.