I don’t know if it was legitimate or not, but on an FR thread a number of days ago it showed the guy with a mask on.
He was said to be the shooter, and I couldn’t recognize him.
You cannot identify him from his face in the videos.
You might be able to identify him as David Bailey from his distinctive bracelet/wristband:
https://freerepublic.com/focus/bloggers/3937685/posts?page=107#107