The definition of best is very subjective. You have to look upon and find what can give you next connecting dot to enhace your skill.
Much of what I have seen on Youtube regarding these subjects has been very poor.
I don’t recall having seen any good ones.
That doesn’t mean they don’t exist, just I don’t recall ever having seen them.
I only recall seeing very bad tutorials on Youtube. It is usually when someone posts a problem here after following them.