I would have to ask why this question comes up so often?
Having already pointed out-
"For me, the style of correctly learning how to pedal, was quite involved, took a long time to perfect,
and it begins when you first start to ride. And after a period it becomes second nature,
and later, you just do it subconciously, just like maintaining your balance on your bike.
Being able to maintain it, you then move on to being able to maintain it a higher cadence."
Also, already pointed out, good bike set up- crank length, seat height, cleat position
are the first steps. Gearing (and use of "fixed gear" and rollers can aid) as discussed.
Anyone who is interested, can go over what has already been covered, and make up their own mind.
Some great points, have been covered here, already.
Toolish, from the video you supplied, it would be hard to ascertain your technique, as you are restricted.
Better you do it on rollers, or have someone film you from behind, on the road, to get a proper picture,
in my opinion.
Cheers

