I haven’t actually seen Loose Change, though I have seen one other video of this sort, and it was ridiculous. I especially found amusing the part where the film argues that something you see on the side of the fuselage of the South Tower airplane can’t be a reflection, because of how it looks from different angles, and so the film concludes that it must be some special object, probably a huge bomb. However, the ‘object’, looked at by my non-LSD-tripping eyes, reveals itself to be the shadow of the right wing’s engine nacelle.
(Also, every time I watch the Zapruder film, Jack Kennedy’s head seems to move in such a way as to obey the law of momentum if he were shot from behind with matter expelled more or less forwards. But maybe I need to use more LSD.)