YouTube content creator usually are looking to get the most views on their videos. The higher their views, the more money they can get from advertising and promotions. I would be very critical when a unknown crypto coin is being promoted. It might be case that the YouTube got hired directly to promote it. Looking for independent high quality research on cryptos can be hard. If you are willing to pay money for it there some opportunities, but for free it's limited. One chance could also be to check with your bank. If you have a depot at UBS, Deutsche or one of the big American banks, you could ask them for some research. Many of the big banks have their own crypto desk by now and they send around client notes.