All the videos on youtube are flickering on my Ubuntu.
See screenshot: http://imgur.com/51dAk
This happens with HTML5 enabled and disabled.
I am running Ubuntu 12.10 on a Thinkpad X61s.
This only happens on Google Chrome.
This seems to be a known bug:
A workaround that did it for me, was starting chrome with this command line parameter:
The problem seems to be with the hardware rendering: I noticed this behaviour when I enabled the flag “Override Software Rendering List”, i.e. enabling GPU acceleration on unsupported hardware.
Have a look at chrome://flags whether it is enabled for you as well.
(I have an Intel GMA X3100 graphics card in a Thinkpad x61-7673.)
I recently started having trouble with Chrome's video (Mar/Apr 2013, Ubuntu 12.10), but only in YouTube. The sound was still ok, and other sites were fine.
I found similar problems reported on Windows Chrome and loosely followed their instructions to disable the PepperFlash pugin. This has improved things massively. Try:
(Maybe this entry could be improved slightly?) (The PC mag article I found the answer in said something about Google monitoring.)