That tin/can opener is used incorrectly in the video. It's a forward opening Victorinox-style opener, and should be operated in an anticlockwise direction, which, once you've mastered the technique, opens the tin/can very quickly. Using it in a backwards direction, going clockwise, as shown in this video, is inefficient and creates a dangerously jagged edge. xx
That tin/can opener is used incorrectly in the video. It's a forward opening Victorinox-style opener, and should be operated in an anticlockwise direction, which, once you've mastered the technique, opens the tin/can very quickly. Using it in a backwards direction, going clockwise, as shown in this video, is inefficient and creates a dangerously jagged edge. xx