- Extension: UMV
- Samples: http://samples.mplayerhq.hu/game-formats/umv/
UMV is (suspected to be) a full motion video file format used in the DOS game Are You Afraid of the Dark? The Tale of Orpheo's Curse.
The format is split into individual "packets", with no special header. Each packet starts with 4 bytes packet size (big-endian, including the 4 bytes for the size itself), followed by the size value of the previous packet (0 if there is no previous one).