Are you sure about that? The music video was the scenes from the movie.

The impression I got as a Daft Punk fan in the 90s was that the movie was commissioned alongside the production of the album and not an afterthought.

The album was released after a couple of singles (iirc) but that’s very typical for artists to do. So it would make sense for the movie to also be released after the singles, even though it was already (mostly) completed.

Edit: seems my memory is largely correct. The movie was always a planned part of the album.

https://en.wikipedia.org/wiki/Interstella_5555:_The_5tory_of...

Urm, the release date of the movie is not actually an indicator wherever what he said was true or not.

It's more then likely the backstory he outlined, which is I believe a minor subplot non-essential to the main story of the movie - has been added like this precisely because that was the theme of the song.

Because this was actually made by humans, they frequently talk with each other when making art in collaboration