Even thinking youtube is being used primarily for review when someone is out of practice isn't really the most calibrated way to think of it from what I have se

Even thinking youtube is being used primarily for review when someone is out of practice isn't really the most calibrated way to think of it from what I have seen. It's more about new technologies like sophisticated robotics or edge cases and outliers. Conferences, papers, audio and presentations are all part of the continuous education on these topics. If something is crucial there is probably more direct mentoring and gradual responsibility going on.