I'd like to hear someone's reasoning for why the rusher at the top of the screen isn't putting the QB under duress (assuming that we're defining "under duress" as "in danger of tackling the QB for a loss of yardage"). He seems to end up pretty close to the QB even though the tackle is trying to steer him round the corner, and if the QB holds the ball a few more seconds it seems to me like he's going to have to step up to avoid the pair of them...
That's not to say I'm arguing that this should definitely be grounding, just that as Bill says, it'd be helpful to have some components of "duress" that we can identify, and if consensus is that this shouldn't be grounding, this actually seems like a good play to use to work out what they are. Does it matter that the rusher never actually forces the QB to move? Does it matter that he never completely beats the guy trying to block him?
(Also, the first thing that came to mind when I saw the clip was
Tom Brady in That Super Bowl, which looks like it'd be a good starting point for comparison.)