NB: Disclaimer "This is not financial advice. Please consult your financial advisor to associate the risks involved"
So I'll just keep it short and simple.
As you're aware, many YouTube videos are sponsored by some projects and brands, that's very normal. But it becomes scary when Youtubers are paid extra for not mentioning the sponsorship. It's very easy for newbies or even some experienced ones to get sucked into the pump and dump projects.
Don't make your moves in Cryptos based on YouTubers.