Searching them now one by one,I dont usually follow crypto youtubers especially before since I thought of them doing content for only Bounties in ICO before so they will sure to give good feedbacks or reviews in it, but now i may find it suitable fir technical analysis and to get updates sincebI prefer joining in telegram groups for update before.
There are good and bad people every where, on every platform so on Youtube, you can find good Youtubers and also bad ones.
Bad Youtubers only care about their financial incentives and don't care much about quality of their works and their community. They can build up their channels, looks good early but later will accept any advertisement deals just to get money. You will have risk if you like their channels. You can lose your independent thoughts and will be scammed by their advertisements.
Good Youtubers care more about their work quality and their followers. If they advertise for anything, they do check those companies very carefully. They won't harm you with their advertisments and you can learn many good things with their videos. But they are scarce Youtubers.