Now I didn't watch the link as I just don't based on my previous experience with youtube videos. But as said you must not generalize things as particular model have their own way of the speed loading. I have seem some that pass the whole length of string through and you must balance the two sides before loading and then some that uses two pieces of same length string when they are being loaded. And as said some use the feed knob and other uses the hub.
Basically you got to be specific about what you are talking about.