that's like, right on the ragged edge of what i consider to be "just puck handling", he was going pretty parallel though i think it's a stretch to call it "backwards" given the camera angle parallax
just a million ways to interpret the rule cause all it really says is the puck has to remain in motion towards the goal line
every stickhandle pulls the puck forward and back so that's a big ol grey area. i guess you could argue that a puck travelling parallel to the goal line would technically be moving away from the goal line once it's outside of the post's plane