If additional change control is necessary (as a read-only fileserver is still missing some form of audit trails and other protections), think of controlling the hash (e.g. MD5, SHA1) of the video file besides the other metadata of the file (e.g. author, changes, link (howste)).
This also works for other software files.
In the past I also controlled an actual copy (within a zip-file if extensions were not fully free) in doc control, even if it did not provide a viewing copy in the system, but remained extractable. Equivalence or true copy could be proven if necessary then.