Why is this even on one of your hands? It's not a scientific paper, it's not a product he's selling, it's an informative youtube video. Whining about a youtube video not citing sources because it's not a valid classroom project makes as much sense as complaining that it's in English so you couldn't air it on Telemundo. It's completely irrelevant. If you're talking to someone and he tells you an interesting story do you go "Oh that was really cool, but you didn't tell me exactly where you learned all the details of the story, so that really detracted from my experience of listening to you"?
Why is this even on one of your hands? It's not a scientific paper, it's not a product he's selling, it's an informative youtube video. Whining about a youtube video not citing sources because it's not a valid classroom project makes as much sense as complaining that it's in English so you couldn't air it on Telemundo. It's completely irrelevant. If you're talking to someone and he tells you an interesting story do you go "Oh that was really cool, but you didn't tell me exactly where you learned all the details of the story, so that really detracted from my experience of listening to you"?