How do you people record video? My cell phone, while it allows video recording, doesn't allow me to upload onto my computer. There's some issue with the blue tooth connection.
if you don't have a camera, i think smartphone/tablet is easiest. you should be able to borrow from a friend or something.
Punch" the keyboard. Forcing your arm down wastes a lot of energy and requires lots of muscular conditioning and building.Pretend your hand is playing handball and your "ball" will strike the keyboard and then rebound off the fallboard. Speed is what makes the hammers strike the strings faster, not strength. This is the general description that should make it easy. There are other smaller movements that will make it even easier and much more comfortable. Figure them out yourself and come back and tell us about them.