Answer
What metadata do video files carry?
Frequently more than a photo. MP4 and MOV files record location, device make and model, creation and modification times, and the encoding software.
Updated
Video gets far less attention than photographs and usually carries a comparable amount of identifying information. A clip shot on a phone typically records the device make and model, the creation and modification timestamps, the software that produced the file — and, if location services were on, GPS coordinates.
These sit in the container rather than in an EXIF block. MP4 and MOV are both built from nested boxes, and the metadata lives in dedicated boxes within that tree — in the QuickTime convention, location is written to a box whose name begins with the copyright character, which is why generic EXIF tools frequently miss it entirely.
There is often more than one copy. A container can carry both a QuickTime-style metadata box and a separate user-data section, each holding an overlapping set of fields, and a tool that clears one while leaving the other produces a file that still answers the question you were trying to close.
Removal does not require re-encoding, which matters much more for video than for images: re-encoding a clip is slow and visibly lossy. The metadata boxes can be dropped and the audio and video streams copied through untouched. The video remover works that way, and the MP4 page and the MOV page cover each container specifically.
More on this: Video metadata remover.
Terms used here: EXIF, Re-encoding.