OK, this is old. But I’ve been watching a couple movies I got (Steve McQueen’s “Bullitt“, for one).
Posting here the few I find interesting. The full list can be found at steampowered.com:
Day of Defeat: Source Beta

New team identifier icons as rewards for completing achievements - 1 per class achievement, and 1 for completing all achievements
Added [...]

Forget the new Medic achievements. Check this out:

Added new attack animations to most melee weapons
Added new speech for the Heavy and Demoman
Teleporter effect no longer shows up on invisible or disguised Spies

 Cool. The character animations and voices are the main reason I like this game. The teleporter change is also great for Spies. Now, one [...]