[Rumori] Req. Slightly to Drastically Modified Films History

[PeterALopez]

This is a request for ideas on the history of modified films. (slight to drastic)  There's a core of creators who became grouped under the banned 'Fan Editing' after the "Phantom Edi" of Star Wars, but there's very little understanding of what kinds of modified films took place before this digital generation.  Curious what are the historical precedents to this phenomenon.  There's gotta be cases of similar exploits done by artists even from the early days of film.  If you have any suggestions on past film modifications to research into please post away.
thanks in advance
PeterALopez