On the non off side call! In my view it was not offsides. Clarkson moves the puck diagonally in the neutral zone to a cutting player who straddles the blue while keeping his back skate behind the blue line as the the puck deflects of his stick. The puck enters the zone before his back skate so it is ON sides.
On another play in the same sequence, Brousseau poke checks the puck back in Cornell's D zone but both Clarkson "touch up" getting them back on sides.
It is a clear goal by Clarkson players hammering home the centering feed/pass with forehand hand (left hand) One cannot ramped up and with force a shot like that with a kick.