@avinatbezeq: I just jumped there and tried the High Quality WMV (http://ecn.channel9.msdn.com/o9/te/NorthAmerica/2010/wmv-hq/DEV322.wmv) and it played fine with audio and video for me (video being just the slides, but that is all there is for that session). Did you try just clicking on it there on the page?