4/5 is 80%... 3/4 would be 75%. I'm 20%... only thought the Travel one was true.

So when you don't wear proper protection heat escapes most from that area. Yes, which means most of it escapes through people's heads (Because fewer people wear hats than pants) and therefore it isn't a myth (Although I knew this answer before watching the video anyways.)

Like how if everyone always wore condoms and had a lot of oral sex it would be likely that most sexually transmitted diseases would be spread how? But by his point it would be false and silly to warn people...

The Travel one is misleading... They say it's not the busiest day, that doesn't mean it can't still be worse, average travel delay which is not considered in number of flyers is would seem to be a good factor to consider....

The hat one is kinda off. Granted, I don't believe you lose any more heat through your head than anywhere else, but the body protects the brain. It will shut down your extremities to keep the brain warm. You wear a hat, you keep your brain warm, and your body then can "concentrate" on keeping the rest of you warm.