A perfect little window into the past
If you don't think it's too morbid (and u enter with curiosity rather than irony), this channel has really cool/weird/sad footage of people reacting to 9/11 in weird places (malls that turned shoppers away, Sears where people watched the news on floor model TVs, bars where customers are offered free drinks)
Another good channel is Old Footage Wanted (people giving house tours in the 80s to no one)