i have a problem with my nokia n900 browser the browser only plays 240p videos but not play 360p or 480p what it means why this device not playing high quality videos and only plays youtube videos not play videos from other sites why? and i not able to play farmvilla on facebook why can any body help me to sort this out.

Certain videos on different sites won't play due to N900 only having flash player 9.4 and not the new flash player 10.2/10.3. Installing tweakflash and changing to android flashplayer works on some sites, but not all. It used to work on facebook, but I'm not sure if it does anymore.

You cant play videos in 360p or 480p quality because it would be really laggy. Try using YTube or CuteTubeQML from the repos (both probably still in extras-devel) to watch youtube videos in high quality. For other Flash objects that don't work try Tweak Flash plugin version, it lies to sites that you have Flash 10 (N900 has only Flash 9 and that is causing your non-youtube problems) and makes some Flash games and videos work. It wont however give you Flash 10 functionality.