Pulling Variable from variable in URL stored in DB

[Atari.2600]

If $youtubeurl = http://www.youtube.com/watch?v=ytWAw6YqN10SHow do I create a "v" variable and have it extract it from $youtubeurlExample:I have the youtube url stored in the DB but when I am embedding the player the URL needs to be formatted likewww.youtube.com/v/ytWAw6YqN10?fs=1