lynch has been known to do this throughout his career, and when he discovered how much he could do with digital editing, he utilized it a lot especially in season 3 of TP. also look at some of the shots of the private jet that Gordon Cole and crew fly around the US in. it is stock footage too, edited as well, and was used once in an earlier produced private jet advertisement.
That is really interesting. It goes entirely against my mental model of Lynch that would eschew stock footage, but I guess it does make sense in a way.