The scientific fact of airplanes colliding with buildings at full speed causing catastrophic damage and fires. The scientific facts of fire weakening steel. The scientific fact of something gaining momentum as it falls. The scientific fact of a single floor being unable to support the weight of several floors crashing down onto it. The scientific fact of unfought fires being able to cause catastrophic damage in a building, even without it being hit by an airplane. Etc etc etc...
Then there's all the evidence. The security camera footage of the hijackers boarding the airplanes. The martyrdom videos that the hijackers made. Osama Bin Laden admitting to the crime. The radio traffic recordings. The radar tracks. The many videos showing the WTC towers collapsing from the impact points. Etc etc etc...
Then there's the investigations into these events, three of them so far, showing how the hijackers did it, who dreamed up and financed the operation, why the buildings fell, what building and fireproofing codes can be changed to prevent this from happening again. Etc etc etc...
In short, my view is based on evidence and analysis from world leading experts. Your's is based on a guy working outside his field in a youtube video.