They'll give analysis from altcoins most of the time and in that case, they're going to shill their portfolio. You can follow whoever you want but I'm only giving a reminder that not all of them are reliable source.
Most YTers don't know what they are promoting or what they are saying especially in crypto. If they learn a lil bit, they thought they are some kind of expert advising someone to invest in a particular coin. A lot of them are just being paid. If you will look at some telegram channels of these blockchain projects, you will encounter some users offering their services to promote in their YT channel, in exchange of course of some compensation. So yes, I really don't trust them either. Also, knowledge of TAs are great but when it comes to crypto, they are very seldom used.
And that's why don't just trust any from those people because they probably have a reason, an agenda that's not based of what they want to say but only for those projects they'll mention.