Wow....thank you for posting. I must agree - even independently I see the same "CGI" like effect as described in the NN video. I just had a major "wow" moment....
The planes had to go somewhere. It's known that they took off, they flew towards to towers, and there is no trace of them afterwards.
This person is claiming that their calculations show that planes flown into the towers wouldn't do what these planes allegedly did. I am suspicious of people who make claims like that in the light of simple tests like those above.