I have been setting the IPTC copyright tag on all my .jpg files, but would also like to do this on some video files. I actually have a number of different format video files, but would be happy to convert them all to a single format is there is one in which I can store a copyright statement. So far all of the cases seem to have copyright (or equivalent) tags which are not writable in exiftool.
ExifTool does not yet support writing video files (https://exiftool.org/index.html#supported).
- Phil