IMO, paras. 5,6 and 7 deal with every point raised, albeit with brevity which is unusual, and I cannot see the adjudicator's findings of fact being interfered with in any review.
The video shows you causing the vehicle to enter the box;
The adjudicator found as facts from what they saw in the video that:
The box was substantially compliant, which you argued to the contrary;
You stopped because of the presence of stationary vehicles, which you
argued to the contrary.
That's it in terms of the legal tests, IMO.
...conveys the prohibition that a person must not cause a vehicle to enter the box junction so that the vehicle has to stop within the box junction due to the presence of stationary vehicles.
For the purposes of this paragraph “box junction” means an area of the carriageway where the marking has been placed and which is—
(a)at a junction between two or more roads;
(b)at a gyratory system or roundabout.