Yes, those shots are from Jedi.
You can see Luke walking behind Vader on this shot:
https://vignette.wikia.nocookie.net/starwars/images/d/d7/Vader_leaving_Cloud_City.png/revision/latest?cb=20130324062628Look here for more info: https://starwars.fandom.com/wiki/List_of_changes_in_Star_Wars_re-releases
Unless you Serious never noticed that !!!
Ok Apart from that one but all the rest some have footage in them from ROTJ and the Shuttle shots could be used to expand upon spaceship shots of which there are very little until the end of the film.
I always felt one of the things about ROTJ was it’s lack of Spaceship shots or that it re-used footage on a few occasions also like The Luke in the x-wing shot from ESB.
It was pretty stale until we got towards the end of the film… But it could have done with a few original shots of Space ships for the first half , if it could of done and the whole reaching Endor Part. Leaving Tattooine and the Fleet shot are good but there really is nothing outside of this. Even the opening shot was a rehash from Star Wars so yeah that is what I mean and it looks like that is what the shuttle shots were meant for and not so much Vader going to his Star Destroyer which was pretty lame.