100% just after the attention judging by the rest of his Twitter feed. Unless he has a DJI Spark that transforms into a Mini 2 at the press of a button…
What a sad muppet…. Trying to ride of the back of somebody else’s stupidity. 
Possibly not flown VLOS if the user was outside the statium and the drone dropped below the roof line?
I saw another clip and that looks like it was overhead.
From this video it looks to be in front of (and below the level of) this big scoreboard:
If they’ve taken off from outside the stadium, there’s no way that’s VLOS.
If they’ve taken off inside the stadium… well. they’ve almost certainly done so from inside a pretty substantial assembly of people.
If it dipped below the stadium roof id expect a pretty immediate loss of signal. If it operated below stadium level i’d venture the operator was inside.
(But yes, counts as a large assembly of people who can’t move out of the way so regardless of weight if its there its not legal).