The thing about items regarded as junk, is they are usually just that. If you're looking for a unique sound, then peoples cast off's are a good start. They're cheap, unusual and most people cannot be bothered to go through the process that Jacques did in the video. You could even go one step further and sample actual garbage - think of the PR.
Personally, I like finding things at home like spray cans or items you hear everyday. I am terrible for picking up "souvenir" instruments on holiday and children's instruments in charity shops (especially when I go through my circuit bending phases... hahah).
After all the research I've been doing on Pierre Schaeffer and Musique Concrete, I found the video with Jacques quite a funny coincidence. Especially as he refers to capturing "moments with sound"; a view that very much alligns with Schaeffer's approach to sonic objects.
On another note, I re-installed Premier Pro so it's back to the video grind.