No I did not try ext3, was running late last night and had to work this am. Is rooting difficult? I would like to get this working before our ski trip in a couple weeks. Is it likley that I mess up the tablet rooting? Sorry but this is the first time I have needed to alter a mobile device for any reason...
Just a little update for everyone. I tried some more file formats once I got home.
NTFS, ExFat, ext3, and ext4 all say "blank SD card or unsupported file format". Then I get prompted to format in the Venue to Fat32.
Fat and ext2 both do nothing, can't even try to mount, and get no error message. It only shows a message when removed.
So I guess it is shrinking video files, waiting for root, or just playing them on the MOMO...
Thanks again for all the effort though! And please post if anyone finds a solution.