I just watched a couple minutes of it. There's a lot of other research out there such as "The Great Cholesterol Con" which I haven't read but see recommended around here.
The one thing at the beginning that caught my attention was something about how many people with normal cholesterol levels have heart attacks. He uses this as evidence that the "normal" level is too high. The other way to look at it is that cholesterol levels aren't linked to heart attacks quite as closely as previous research would indicate.
If you want to research this, do it because you want to become educated, but don't do it to "win" arguments. You'll typically do far better to deflect the arguments instead of fighting them. Something like, "I can't argue with that, but I don't want B12 shots or supplements to maintain health." or even, "I'm glad it works for you. Thank you for your concern." Don't engage with this, unless you are already educated enough to know how to stand your ground and don't mind angering these friends or becoming angry, because someone will soon be offended.