The part of your keyword is crucial. WMV is an ancient format by internet standards. If you have a copy of czechparties5part6.wmv , here's why you're almost certainly looking for a "better" version:
: WMV9 offered compression that allowed relatively clear 480p (and later 720p) video to be packed into tiny file sizes, making it superior to older MPEG-2 or early AVI encodes. czechparties5part6wmv better