Video is slowed down though. Looks like a clean hit to me with unfortunate results.
At live speed you can count it out.
Rooney touches it at the start of the video, the hit is as it becomes 2 seconds:
The argument for Miller is he throws it near Rooney and then acts as if Rooney has the puck, but Rooney doesn't really move to possess the puck before being blasted.
Ultimately the interference penalty is to protect players from being hit when they (reasonably) aren't expecting to be hit, and this is exactly that. I guess the question is whether this should be a valid strategy as a puck carrier when a defender is skating towards you.