Is there a way hide all tags from an MP4 file so the info is still there but not readily available when viewing the file's details? -all= doesn't actually remove much from an MP4 file, and I can't find a way to remove certain tags (like VideoFrameRate, BitDepth, etc), so I would at least like to "hide" them. Any suggestions?
A lot of metadata in a video isn't editable. The examples you give are simply properties of the video.
You can tell exiftool to only extract or suppress specific tags. See the -TAG (https://exiftool.org/exiftool_pod.html#Tag-operations) and --TAG (https://exiftool.org/exiftool_pod.html#TAG1) options.