Well for one thing you coast alot
Right there you probably wasted about 5-8 seconds on that course just coasting.
When autocrossing you are either on the gas or on the brakes. When you are not on either you are wasting time. In alot of those sections it seemed (from the camera movement) you would just lift off the gas and just wait and then get on the brakes. When I autocross I'm on the gas til the last possible second then JAMMING on the brakes.
Also the one slalom you were really late getting onto the cones and it killed you on the exit. You want to make sure you get on the base of the cones with the back inside tire.
Also if you can you should back out the view of your camera to see your hands at work. That will show alot too.
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