it may also be down to the player you are using and not the N900s capabilities-try a dedicated player if there is one for the files you want to play, or try kmplayer. you could also wait for the official release of vlc player, which should be able to handle almost all video files, and give an indication of whether the N900 is really up to the job or not. the N900s built in player seems to jump/skip with some videos that work fine on a pc, although strangely it does not seem to always be a high bitrate or high resolution issue with all types of video