How can I embed video in WPMU without a plugin?

How can I embed video in WPMU without a plugin? I have been using the viper video quicktags to overcome the fact that WPMU will strip out the embed code but that plugin is only good for certain sites. I am unable to embed video from cspan or msnbc... It works for youtube but I'd rather not use a plugin at all if I can accomplish another way.

I have tried editing my kses file but have still had no luck getting an embeded video to show.