to render or display flash content, you'll need to install a browser plugin. you're typically prompted if you don't already have it installed. flash is probably one of the most efficient way to display audio/video on websites without having to worry about different operating systems and their typical media players...its very popular in advertising for this.
heres a little clip i made...
PW5 64, E6300@2.8, X1900XT, (5) 74GB RAPTORs, 2GB Corsair XMS800, ATI HDTV Wonder, DELL 30\"