Are you running FAB CADMEP by chance? It looks like your library might be from there. You decided not to reveal your software in your video for some reason. I do love the old-school toolbars-only look

AFAIK your library content is calling for that: you don't get to decide sadly, unless you wish to manually edit your entire library to remove all possibly links to FAB in each of those source DWG files (freebie add-ins like ZOMBIE KILLER can do that if you've never installed it).