There is a WMV stream at
http://robotics.arc.nasa.gov/events/...rcwebcasts.php at 320x240.
If you cannot use the stream I can encode the AVI's into WMV's for you. I'll start with the 720x480. Please tell me if you need it in 352x288 or 160x120, or encoded in a specific way.
720x480:
http://www.roboranch.org/media/OverdriveLrg1.wmv, 140MB.
320x240:
http://www.roboranch.org/media/OverdriveMed.wmv, 55.2MB. This one is lower resolution, but has less visible compression artifacts.