Rafael, Flash video (and regular Flash content) is played via the correct
object tag pointing to the swf / flv file on the server. It really has
nothing to do with ASP.NET since this tag needs to appear in the HTML of the
page. Of course, you could emit it from the server side if you wanted to.
Peter
I've created a free flash player control along with an article detailing the
ins and outs of playing flash files with ASP.NET: http://SteveOrr.net/articles/Flasher.aspx