I compiled crystal-hd drivers from git, and VLC 2.1.0 with it, and it works pretty well, except that on 1080p I have this problem with all videos:
The video does run perfectly smooth, but every couple of seconds, like maybe 5 to 10 there will be a "lag spike" occuring. :/
The hardware is a core duo 1.7 ghz notebook, which should be fine afaik.
The videos I've been watching have been loaded from the internal hard disk drive, not over network.
Solved it already, turns out just increasing disk and/or file cache by a factor 10 got rid of the lags.