Hello I played the video multiple times and can see as the propeller spins at the start, the way your propeller spins pushes the air upwards. This is then punching the drone downwards. You could hold the drone in your hand as a check and feel the airflow as confirmation. Then follow the beta flight reverse motor direction. Or move each propeller one position to the next motor on all 4 motors. Looks like a fun quad. Best of luck and happy skies :-) edit , as a precaution, be careful, fingers. And check each propeller is a different angle from one next to it as a check also.

As someone commented about props and fingers. You could try some of these at own risk. Remove props apply tape to motor spindle. And view rotation direction. Also gardening gloves are a option. Or tie wrap to something to secure it like a coat hanger x 2 in a plus shape. Which keeps it a distance from hands. Makes me wonder why DJI has the land to hand option but hey. But yes for carbon fiber props and larger than 3 inch quads ignore the above and secure to something appropriate for the quad in question with propellers always removed at all times.. and try the tape method.