They are all as bad. Johnathan Katz-Moses did a video a few months ago giving advice on how to safely use a planer/jointer, his advice showed some (in my opinion) bad techniques.
Here is one of his latest videos about how he has just cut the end off his thumb on his planer/jointer and what he should have done differently (which still looked bad technique to me)
For some reason the link is starting half way through so you might need to go back to the start.
There is a lot of bad/dangerous advice out there.