you always drop your lead hand a little bit before you throw the jab, a big tell if you were sparring would like to see some more defensive, whether moving your head, feet or simply just pretending to block/parry. I cant remember the last time i got a 20 shot combo off! looking good though mate, defo got some power!
looks/sounds like you have good power and solid speed, but your hands are too low, you lower them before throwing a punch, other than beginners almost any fighter could find a way to counter you, you should probably add some head movement as well keep going, you have that power in your hands