YouTube is awesome. I use it almost everyday for a variety of things. But you have to be incredibly cautious about what information you are getting from it. I used it to repair a couple of snowblowers yesterday. Really useful. Got to see walk-throughs on how to tear-down my exact model. The two videos I used were, as best I could tell, by individuals who owned a small engine repair shop and had years of experience working on snowblowers and the like.
For other subjects, you have to scale it up but do essentially the same thing. Who produced the content I am watching? What motivations did they have in producing it? Are they trying to make $$$ in any way (increase their brand, drive clicks to another website, etc)? And am I watching opinion or information?
Throughout this thread and others, 9/10 of the YouTube links shared are either opinion shows or someone attempting to monetize something or other. And it is okay if the channel or content producer is attempting to monetize their YouTube channel if their $$$ is based on being informative rather than opinionated.
For example, these dudes are trying to make money on YouTube but nor for their opinions:
https://youtu.be/35Idb_lCU4o and that puts them in another category. You can always look up the folks producing your content and see what others are saying about them:
https://www.aapa.org/news-central/20...tional-videos/
In contrast if the video has links to political activists, anti-vaxxers, or doctors that haven't practiced medicine in several years...you may want to find another source of "information" because that one is likely fundamentally flawed.