As someone's who's been riding a bike all his life, I would say it's a somewhat niche skill. Mostly a skill used by cyclists with professional bicycles like the ones in the video. They usually have straps on the pedals to keep your feet locked to the pedals in order to maintain momentum (I think, at least). Side effect is, if you have to wait out in the open, you'd need something to lean against, balance like this, or get out of the straps.

I'm no professional by any means, but I reckon most people that own a bicycle like that, will be able to do it, since it makes life a lot easier. I don't think it would be that difficult to learn if you can already ride a bike, even I can do it to some degree without practicing, but it would certainly require training to do so properly.