Hi

I have been trying to figure out this all day and I can't seem to figure it out. If I have code such as
Code:
<video width="640"  height="360" src="http://www.youtube.com/demo/google_main.mp4"
How would I make the youtube link dynamic through something such as a user inserted URL. I can't seem to figure out how to make that youtube link change.

thanks a lot!