There's another video of the guy slightly earlier, he's not wearing a mask, and people are suspicious of him.
He seems to be using a skimmer or something like that, whatever he's waving in his right-hand is awfully suspicious.
He's also approaching riot-police, an odd thing to do if you're supposedly that frail.
He's barely pushed at all.
He's practically sitting around the time he goes off-frame.
The sound doesn't make much sense if you watch the video a few times. There's also this screen-grab, which I can't tell if it's a shadow or something on the back of his head, but interesting anyway.
Then he's bleeding out of his ear ... which is odd ... why would he bleed from his ear? You can hear one of the officers call it out "he's bleeding out of his ear, get a medic" & you can also see it if you pause-frame. The mask also appears to have 3 straps. His head also appears to be off the ground in that frame.
https://twitter.com/thelastrefuge2/status/1268784881422786560?s=21