I find it remarkably irritating that I can never watch these things via quicktime. Does quicktime actually run for anyone else. This isn't the first windows machine I've had that chokes constantly trying to run that.
Well worth the effort to install VLC media player, however.
I have VLC player installed; but, I still watched all of these (and the LL LTRM tutorials, and the LL CTP tutorials) all in Quicktime (simply because that is what auto-launches when I click the files).
I have had no problems what so ever.
Athlon64 X2 4400, 3 Gigs Memory, Windows XP SP2, GeForce6600 Vid Card.