I agree about people without a clue posting videos, most often hand held 90deg off angle, and shaking like a drunk in DTs.
However, I believe that YouTube is an invaluable resource for learning things. You can't take everything at face value, but I have learned so many new things and/or avoided doing things that I would have. Of all the things on the Internet, I would miss YouTube and some forums the most.
I've learned to fix many things on my cars/trucks via YouTube. 1A Auto makes GREAT videos for basic car repair. There are Many others. You just get a LOT of chaff in the grain and YOU have to be smart enough to ignore those videos. I've developed a pretty good YouTube filter and can usually tell early in the video that its not worth my time.
AND I HATE THOSE **** UNBOXING VIDEOS!!! I mean... come on... how did that ever become a 'thing'?