Try fraps at
http://www.fraps.com/.
The unregistered version allows you to take a 30 sec. video from your game.
This should be enough to check if it works good for you.
If it appears to be jumpy, just restrict your max_fps (just to have some cpu cycles left for the fraps application).
It works fine for me.
AND, don't let you tell you the free version is without sound - this was an older version for Win95.
-- slacer