Bug#84994: XVideo on Mach64
I saw this bug and thought you might be interested in knowing about patched
version of the XFree86 Xserver that has XVideo (and DRI, actually) working
for Mach64 chips.
Add this line to /etc/apt/sources.list, and install
xserver-xfree86-dri-mach64. It will divert the original X server and replace
it with on that has been patched to include XVideo support. (Getting DRI to
work will take building the kernel modules.)
This patch will eventually be included in the regular XFree86.