All I can use is my own knowledge of how skating works. I used to do rollerblading at extreme sport levels and did ice skating various times as well and it was very natural and familiar from my rollerblading skills.
Since absolutely everything related to turning and breaking is from touching the ground, which becomes 100% instinct to maintain and use to direct yourself, I can't think of any reason whatsoever that you would be lifting your leg up ahead of your motion. The video doesn't show anything at all tripping him, pulling on his leg, knocking his leg up, or yanking his arm downward so as to cause an overall body rotation. It is all just open ice and he seems fully in control. He even pushed off sideways to launch himself directly in the direction of Johnson.
Even if something did in fact pull on his body, the only available explanation would be his hand holding the guy in front of him. The natural bodily response to regain composure from this (if he doesn't want to shoulder check, which would be 100x more of a hockey thing to do) would be to bend his knees to crouch and swing his butt around to follow in the direction of the guy in front of him and maybe turn right to cut off the skate path of Johnson. Instead he is very clearly holding his right leg firm and spine upright to turn his left leg up. It makes no sense why a proficient skater would ever do this, It is completely contrary to the fundamental body mechanics of skating to make upright forward extensions.
Well I'm pretty sure they have much better cameras on these games than our potato twitter video, so I'm sure they'll see more.