OK, I now have internet at home and I could test the driver 2:2.0.0-6 . Nothing improves, I am afraid.
I tried it with the transparency and shadow effects in KDE. I uninstalled Beryl because it is obsolete, and I don't know how to make compiz work properly in KDE :-)
So the following is with the transparency and shadow effects in KDE.
If I try to reproduce an AVI file:
* Only mplayer plays it OK.
* Noatun, totem and VLC crash at the beginning.
* Kaffeine does not crash but only reproduces sound, no video.
If I try to test the webcam, luvcview hangs:
luvcview version 0.2.1
Video driver: x11
A window manager is available
X Error of failed request: BadAlloc (insufficient resources for operation)
Major opcode of failed request: 141 (XVideo)
Minor opcode of failed request: 19 ()
Serial number of failed request: 25
Current serial number in output stream: 26
Hope it heps,