That video is anything but helpful. That guy doesn't have a clue about what he's doing, and what he does do is all wrong. He is just the kind of shade tree mechanic that screws up good original parts through ignorance instead of either taking the time to learn how to do it right or passing it on to someone who knows what to do and how to do it right.
You might get the idea this kind of foolishness makes me a little upset. You'd be right!