The puck also appears to be at the apex of its flight at the point where the orientation of the axis of rotation changes. That seems reasonable as the apex is where the puck's kinetic energy is lowest (having turned a bunch into potential energy) and you've got someone waving at it with a stick, even the air current from a near miss could start it tumbling.
I mean if we had a physicist with lots of time to parse the video frame by frame you might even be able to solve this fairly conclusively with math, but it wouldn't convince the Oiler fans anyway nor would it change the fact they lost.
Still a bit of a fun thought experiment though to consider.