The "C9 Stage" sessions take a little longer to get online, but they are being processed should be online soon.
In the mean time, if you've not already seen it, check out "The Future of C#" http://channel9.msdn.com/Events/Build/2014/2-577
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@ciupaz: Yes, VB.Net is supported now and into the future. VB.Net is mentioned a number of times. the important thing to remember is that there's one language team for C# and VB.Net. Also a commitment has been made that the two languages will evolve together. So while there wasn't a specific session for VB.Net, it is indeed alive any well...
@alin: Best bet to get that would be to contact the author directly, via http://www.codeproject.com/Articles/743862/Kinect-for-Windows-version-Body-tracking
Channel 9 videos should play on any browser that supports H.264 MP4 or WebM (IE, Chrome, Firefox, Safari...)
If the video isn't playing, try changing the format. C9 will try to automagically determine what the best format is, but sometimes it takes a human touch. Below the video, click on Format. HTML5 is a good option usually. If you have a C9 Profile, you can change your detail format there too.