The first player turns his skates and initiates contact with the second player, but he has to do this to stop from running into the corner. He's not attempting an interference play, he's trying to stop out of necessity. He drops his shoulders in expectation of incidental contact. He does not come close to having posession of the puck, and therefore, is not a legal target for non-incidental contact. This is a hockey play.
The second player sees this play all the way and has ultimate control over the outcome. The first player initiates contact out of necessity, and then the second player not only does not attempt to slow his momentum, he follows through with a right arm shove that results in directing the first players torso in an ice-parallel direction. Right at 0:16, you can see the first player braced for incidental contact, that would likely results in a play that has a low probability for injury. Then the shove, moreso that than the second player's momentum, throws the first player off balance and into an airborne position that is awkward, defenseless, and in the critical danger zone (3'-6' from the boards). This is not a hockey play.
If the second player doesn't shove, this play is an awkward fall into the boards at most, not a catastrophic body missile sent head first into the boards. Minimum 10 game suspension for the second player and let the guilt do the rest.
There is very little I agree with here. You said several times that the first player initiated contact out of necessity. I'm pretty sure that he initiated contact for one reason only, to initiate contact. If the second player eases up there he would end up on his ass. This play is very similar to when Recchi hit Kennedy in the playoffs (one in which even the TV mutts were saying was borderline interference on Recchi
). The only difference was Timmy lost that one, and everyone on here said "Well, at least he learned a lesson and wont lose one of those battles again."
This was a routine play. Someone got hurt. If he didn't get hurt, it would join the other 10,000 hits just like this that have occurred around the world this year that none of us heard of.