Very, very, poor, practice in putting a light-controlled pedestrian crossing almost directly after the YBJ !
The video shows the red car probably vastly exceeding the speed limit, shooting round into your path, before you would have had any time to react and stop before entering the box. I would be tempted to take this to adjudication at London Tribunals, but you'd have to risk the full PCN penalty. I would have thought any adjudicator worth his salt would at least receive your appeal favourably.