I remember when PIP was a big new feature on old tube TVs.

YouTube can be tremendously useful, many times I find a content creator who explains how to do a repair or modification of some equipment that I need to finish in the workshop.

They have a lot of interesting courses, lately I'm trying to catch up with Arduino programming and the course that costs more than $100, on YouTube I have free courses that maybe aren't as good as the paid ones, but they are a great alternative.