Can't believe somebody has uploaded the training videos on youtube, takes me years back hearing the narration.
When watching the video, the door mechanisim is best seen when the attendent is closing the door. The little tabs at the edges of the door are the structural pressure bearing stops. The door swings in but when the handle is drawn down, the door with its stops move down vertically, aligning with the stops on the airframe aperture. This takes the pressure loads from the door into the structure. The opposite happens when opening.
Hence this is a plug type door.