Are you
absolutely sure about that? Because that link you posted, to Yahoo! LAUNCH, appears to have been hijacked by some search site, and unless you copied the link from said search site, it seems possible there's spyware on your PC. I've certainly never seen that happen on this site before. I'd do a thorough search for spyware if I were you, using programs such as AdAware and SpyBot Search & Destroy (both available from
www.tucows.net), as this could be causing slow browsing and jerky streaming video.