Yeah, but it’s a bit dumb since you’re theoretically trying to lift as much overhead in one movement (snatch) or two (clean and jerk). As long as it’s overhead it should just be allowed. Or at the very least, there should be no subjective rulings. These days you can use a camera to determine how much movement there is, etc.

Yes, pretty much. The weight should go up because of the explosive movement from your lower body. The arms are just meant to catch it overhead.