0:56 You fell into the classic trap of using Bernoulli instead of Newton. The speed of air above/below the curved wing isn't it (airplanes can fly upside down). You almost had it while talking about angle of attack. It's especially obvious with sails, because it's the wind pushing the sail out, applying forward force to the mast and vessel. A key thing to know about airplanes is that even when they fly at a constant altitude, the nose is pitched up. This exposes the underside of the wing to the wind, and the corresponding forces.
thank you for the insight! didnt even think about how planes can fly reversed lmao. most youtube videos explain the concept of flying close to what i did though.
