The ability to prove these things with cameras/video recorders existed in 2001
It also existed prior to the creation of earth. Perhaps not cameras as we know them, but the ability to record history. When all is said and done, man will know that the final judgment of God is based on grace, mercy, and unalterable incontrovertible inconvenient truth.
What this has to do with Trump claiming he saw thousands of Muslims celebrating in Jersey City on 9-11.... I have no idea. I am not asking to engage in a philosophical or religious discussion. I simply am asking for evidence, not here say.