The NHL video from 8 years ago? How about the NHL rule book from this last season.

Rule 52 – Slew-footing 52.1 Slew-footing - Slew-footing is the act of a player using his leg or foot to knock or kick an opponent’s feet from under him, or pushes an opponent’s upper body backward with an arm or elbow, and at the same time with a forward motion of his leg, knocks or kicks the opponent’s feet from under him, causing him to fall violently to the ice.

Also the 1 NHL video about slew foots has one example comparble to the clip in the posting here. they call it a slew foot OR a trip. Though by the current rule book it isn't