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If that video is the entirety of the council footage, then it doesn't show a contravention.

Agree with Stamfordman.  If you look at the two cars which pass through the box before yours, at the point they completely clear the box the front is behind the white "blob" on the left of the carriageway. At the end of the video, the rear of the car in front of you is in front of the same white blob.

It's not completely scientific, but suggests on balance of probabilities your vehicle could have moved forward to completely clear the box junction by creeping forward until it was almost touching the car in front.  If that's the case, then no contravention was committed as the offence is defined as causing your vehicle to enter the box junction so that it HAS TO stop within the box junction. If the circumstances were such that you had the option to leave the box (i.e. you didn't have to stop where you did), then no contravention was committed.

Why would 'the judge' watch the video? You were given a window of opportunity to challenge the PCN and by not doing so you've already admitted defeat.

You can get it reset if you never received the original PCN but you've confirmed that you did.

If the PCN didn't inform you of the time limits then that might be something we could help you challenge?

I'm pretty sure you never stop moving until the camera zooms out - which coincides with the white VW starting to move off.

In which case no contravention as you can't commit a stopping offence without stopping.

You also did a big favour to the red Nissan behind you by continuously moving so they haven't committed a contravention either (it's only an offence so have to stop due to a stationary vehicle).

As a further point, the van is never completely stationary so you can't be in contravention in any case. Only stopping due to a stationary vehicle constitutes a box junction offence.

Brilliant - thanks for digging that out.

I knew I'd seen something similar before, but couldn't track it down either here or on LT.

No luck so far - I'll keep looking (hope I didn't imagine it).

Meanwhile, this blog post by Mr Mustard offers encouragement

https://lbbspending.blogspot.com/2017/10/up-junction-in-enfield.html

There is also a key case on the London Tribunals website which sets out very clearly that box junction markings which extend beyond a road junction itself are not valid to enforce, and this seems to me to be analogous to your situation.

Extract as follows:

"The problem with the special authorisation is this. Part of the box that it purportedly authorises is not within the junction of the roads. At its southern side it includes a triangle of road that is not within the junction and is therefore not 'at a junction between two or more roads'. The prohibition, however, relates only to a box junction as defined. The special authorisation therefore purports to extend the prohibition outside the junction. It does not seem to me that the power to authorise signs empowers the Secretary of State to effectively redefine the prohibition prescribed by Schedule 19.

This is not an insignificant matter. The box as purportedly authorised extends for a significant distance beyond the junction itself. This increases the distance the motorist has to traverse without stopping, and therefore makes it more difficult for them to make progress without falling foul of the box. It is also difficult to see what the point of extending the box beyond the junction is, given that the purpose of the prohibition plainly is to stop stationary vehicles blocking the junction to crossing traffic. Clearly, stopping in the area beyond the junction would not block the junction.

I accordingly find that this yellow box is not a lawful road marking. Therefore the contravention did not occur. I allow this appeal."

Additional info.

This page on London Tribunals suggests that liability can only be transferred to you if your hire period is less than six months.

https://www.londontribunals.gov.uk/eat/grounds-appeal/grounds-appeal-moving-traffic

Presumably yours is longer than this?

This isn't something I am very familiar with so you may wish to get input from someone who is.