I downloaded a streaming video file that is in .asf format. The video and audio playback is really slow. Is there any way to edit this kind of file to speed up the playback? If not, can it be converted to another format and then edit the playback speed?

Check it out if you'd like. The video is the EPK of Norah Jones here:

http://uk.search.launch.yahoo.com/bin/search/launch_all_ukie/?mt=NORAH%20JONES