It either looks faked to me and/or there are significant compression effects
Some pretty responsible outlets have picked up the story:
http://www.businessinsider.com/trump-bald-spot-revealed-video-hair-transplant-2018-2
https://www.theguardian.com/us-news/2018/feb/07/donald-trump-hair-wind
http://nymag.com/daily/intelligence...llusion-came-undone-and-we-all-missed-it.html
It's probably a lot harder to doctor a video than a still picture.