When moving the video window (in my case a small m4v clip) out of the screen live crashes. It happens in all betas and 8.2.2/8.2.1.
I tried it with a Mov file as well. Crash. It crashes only when the clip plays. But it's annoying because sometimes I want to keep the clip playing and just move it out of the way.
I'm on Vista 64bit, i7 920 6MB RAM.