I really hate misleading threads/videos like this. Who exactly is the "OS movement"? If you are talking about the NIST report, do you really not understand that up against it a silly YouTube video is like a gnat flying around making a nuisance of itself?
I for one (as a layman) have seen nothing that suggests anything happened at the WTC 1 and 2 other than a structural failure resulting from 2 large
planes impacting the buildings at high speed. That has nothing to do with me being an "OS" (whatever that is) believer or anything else.