It seems video performance of the Dell Mini 10v is a fairly hot and important topic for a lot. I thought I'd start this thread to not only share some of my observations, but also to gather what other people have done to improve their video performance issues.
To start, here's the configuration I'm running on my stock Dell Mini 10v (with N280 CPU)...
OS: Windows 7 32-bit RTM with Aero enabled.
Media Player: GOM Player
Using built-in codecs, "VMR9 renderless" video renderer, and have checked "Enabled Quick Play Mode". GOM player has also been configured to use coreAVC instead of the built-in h.264 codec.
Driver: 126.96.36.1995 (as per the directx diagnostic tool).
With this configuration, I'm able to play WMV and MPEG-4 1080p video. H.264 encoded videos however, I can only play smoothly up to 720p (without coreAVC, even 720p H.264 video is choppy). Another note, HD videos on youtube are generally very choppy. However if I download the video from youtube (mp4 file) and play it in GOM player, it's as smooth as butter (must be the built-in codec that flash player uses which causes the problem). So there's a little tip for you; by the way, I'm using flashgot to download the videos from youtube.
I'd really like to hear what other configurations people are running, and what sort of performance they're getting.