Your videos carry your location too
Photo EXIF gets all the attention. Videos store the same thing in a different corner of the file.
Where it hides
In an MP4 or MOV, metadata lives in blocks called atoms. The user data atom, udta, holds a ©xyz entry with the coordinates in ISO 6709 format — something like +40.4168-003.7038/.
The file also records the creation date and time in three separate places: the movie, track and media headers.
Why most tools get this wrong
An MP4 keeps internal tables holding the exact position of every chunk of video within the file. Delete a metadata block and everything after it shifts, those positions stop pointing where they should, and the video becomes unplayable.
KillEXIF does not delete: it overwrites each block with padding of exactly the same size. The file keeps its length and nothing shifts. That is why a cleaned video is the same size as the original — it is the sign that it was done properly.