Precisely. It's the 1983 "Yub Nub" film version ending with the ROTJ end credits, correcting what was an odd mix of ESB and ROTJ film-version material from the anthology boxed set. (The OST used an alternate version of "Yub Nub" IIRC.)

Then it's the 1997 Victory Celebration ending and end title, but with that strange gap of one measure removed.

Then it's the ROTS unused bit that found a home as the end music for my fan edit.

In short, it's the three different film endings using complete cues. Thought it would make a nice home amongst your awesome work.