Problem with youtube: horizontally slow I have a problem with my Debian machine. I've installed it recently and there is a problem with playing a youtube videos. It is like the bottom part is from previous frame. This happens on Firefox and Chromium. I tried h264ify plugins in both Firefox and Chromium. It might not seem like a big problem, but it is quite annoying. Probably it is answered somewhere, but I couldn't find it. Thanks for help. ![The problem](

I've just solved it. I installed h264ify Firefox plugin AND x264 package from repository. I thought that h264ify has the codec included. Thanks riccs_0x.