This video explains in simple terms, easily understood, what every good river kayacker-boater already knows. It is all about eddies. The waves in the ocean do the same thing, but a different plane.
Understand how fish swim & kayakers go up stream, then visualize how UFOs sail and functionate the action of gravity. The original UFOs don't utilize "anti-gravity," just as whales don't use much energy to get squirted through and by wave action!
Your keywords determine which category will be chosen for your video. Use keywords like health, technology, science, politics, food, etc., to make sure your video goes into the category you wish.