The basics of Crank Length (Effect on power, cadence, comfort)

Here is a basic explanation of Crank Length. A more in depth analysis is here: https://www.youtube.com/watch?v=ydePgGR1Lu8&t=732s. ps. sorry I muddled up rpm and pedal velocity at one point. doh! 1:04 crank length vs power 5:02 crank length vs acceleration 5:30 crank length vs gear ratio 7:30 crank length vs fit 10:00 crank length vs cadence