In an on-going effort to ensure that Channel 9 videos only display appropriate content, the Channel 9 Dev Team recently ported the spam feature to filter existing video content.
I think you'll be pleasantly surprised by the results of our first tests using some of the more popular C9 video clips. The video filter should be complete by the time we ship Channel 9 V4.
Congratulations to the dev team and to JKL consulting for creating the original video filter prototype.
Here's a quick 3-minute video of the filter in action.