I think there's been a resurgence of interest due to the work of "Architects and Engineers for 911 truth" which AFAIK made this and other videos and are calling for a new investigation into 911.
If you really consider and digest the implications of what's apparently happened here, it really is a sort of "red pill" moment.
I'm careful to try and stick to verifiable facts though (even circumstantial) and not get involved in crazy speculation.