Both Windows 7 and Windows 10 support exFAT, FAT32, and NTFS, so no I don't see how thats possible. If you're saying that you can't open the videos, you may need a video codec, or something universal that can pretty much open any video filetype like
VLC Media Player.
If you can't see all of the files, right-click on the drive letter, and go to Properties. Go to the Tools tab. Error checking -> Check
ex:
Should give you an idea of whats going on.
If its an issue where files are not opening its probably a codec/playback issue.