Not at all an expert here, but from my point of view as an amateur, I noted two points.
The photos and the video do not show any upright 958 warning sign or 959B signage allegedly passed and in place.
I think the PCN that has been served might have a procedural impropriety, specifically are missing some of the statutory grounds of appeal at regulation 5(4)(a), (c), (d), (e), (f), (g), (h) and (i) of The Civil Enforcement of Road Traffic Contraventions (Representations and Appeals) (England) Regulations 2022.
But, again, not an expert here, so better wait for further replies from the senior members of this forum.