It's great to finally see a tuning video for the DF65.
However, your main sheet bridle ring is too low, which is why the leech of the main closes @ 7:40 in the video.
The main sheet is not supposed to pull down on the boom when close hauled.
You don't want the leech to close or open when sheeting in or out. The twist in the main should remain constant.

This also causes increased load on your sail winch which can lead to burnout or increased battery drain.
The bridle ring should be directly below the boom when sheeted in fully and the boom should be off center by a few millimeters.
This ensures there is mostly only side force tension on the main sheet and not down force tension.

Topping lift is what that jib leech adjustment line is called. Nice vid. I think in Oz we tend to sail fairly open and the stock ripstop sails can be made to perform very well if allowed to breathe.