I've never made a video for that but maybe next time I will. It's really easy though. Take the plastic shield off then lift the brake lever so the brake is not tight on the drum. Work the belt under the brake till it is completely on the back side of the spool. Next use a booger hook to manipulate the belt to the counter pulley. You can see the pully from the backside easiest. Manipulate it into the groove on the counter then go back and make sure it's in the groove on the backside of the spool.
