The third phone clearly shows the flag. Weird though.
I looked at it again, and I think one of the phones (maybe it was #2) did reflect the stage it was just an unusual perspective/zoom. Not sure what kind of phone software may exist that lets users change the lens offset.
It is hard for me to buy into these large scale conspiracies. Conspiracies do exist, they happen all the time. It just requires 2 people planning something in secret. But stories involving scores of people or hundreds of people, all agreeing to collude, perpetuate a false narrative, and all of them stay mum... nope.