For me claw machines require little skill to play, as everything depends from how owner set claw strength. User can simply randomly move controller and randomly choose item. If claw closing strength is enough, it will hold the prize like close grip. But in most cases we see how claw shakes and drops the prize the next second claw was closed. However that is ok. Low skill requirement is perfect for everyone to try to win the prize.
How does one determine though if the claw strength can be adjusted or controlled? I've tried all those YouTube hacks in claw machines including the ones you've mentioned but I just end up being frustrated with my tokens gone. I do see some people being able to get small prices but the ones that are a bit pricey? Haven't seen any take home a price. I look at it as a scam because I haven't won anything from the time I started playing, lol.