It is a source.....
of income to many. But like the Wild West was, it's awash with idiots, dolts and trolls. There is however much value/collective wisdom because if you go there looking for how to fix something or take it apart, you can usually find it.....especially electronic gadgets.
Even if the vids show incorrect procedure, you can usually see their mistakes which allows you the ability to do better.
The Gen Z's say YouTube is dead, but the numbers of viewers and traffic say otherwise. And you hear "YouTube is for old people" by the naysayers....
I was watching this vid once of a Russian guy taking apart a commercial Makita drill I have and reassembling. He couldn't remember how to reassemble it and just gave it his best shot. All he had to do at that point was go back and watch his own vid on how he took it apart.....so there is humor.
Kevin