If you don't know the background of Mark Rober, you can look him up. He's really smart, inquisitive, and engaging. He's turned it into a huge online business and YouTube channel with nearly 40 million subscribers.
Not only is he taking on sailing with your own power, but what about toilet flushing on each side of the equator? Yeah, some long held myths of science are tackled.
Of course, his content is worth watching. It's also safe viewing, even encouraged, for the kiddos.