show me the video or it never happened

Presidential candidate Donald Trump claims he saw "thousands" of Muslims in Jersey City, New Jersey cheering the September 11, 2001 attacks on the World Trade Center.

If it happened, somebody would have posted video of it online. Hey, we've got all kinds of '70s tv shows on YouTube, etc., etc.; but incredibly, nobody's ever posted footage of what Mr. Trump claims to have seen in 2001. Not even Trump's campaign people can find it. 

What a joke.