Scammers are everywhere and that is sad to say, schemes, fraud and fakes videos are also scattered in YouTube channel, so be careful in what to believe into.
When I was student also I used to search cooking video in YouTube especially baking, then I figure out that some video are made just for fun, some are real and most of them are fabricated.
When it come to business venture or related activities like bitcoin, or any bitcoin programs you have to check their background, vision, who are the persons involved, any achievement? History background in order to be sure, before joining them....
I hate to say it but the ratio is probably 100 to 1 in the scammer's favour if you consider the malware out there. Knowledge is everything. Arm yourself by educating yourself.