In addition, I find that serious scientists/engineers/researchers tend to publish papers, with their methods described, sources listed and rationales explained. Cranks tend to make Youtube videos. I have never determined whether that is just laziness on the case of the video producers, or if the sort of people who believe in woo simply prefer video over written material - but it does save time. It's a good bet that any poster that demands that you watch several videos that prove his point doesn't have much rigor behind their opinions.No I don't watch videos, as a rule.