The first thing to say is that Redbridge will reject your reps, as the video shows a contravention, and they like to have the money as well, even if just the discount amount. So you'd have to take them to London Tribunals, and I have to say I don't think the odds are good, but wait and see what the others say.
Of course the PCN, and also the relevant Redbridge web pages may show serious errors which could be used for a technical appeal on the basis of a procedural impropriety, as the PCN is under the Traffic Managment Act 2004, where this is a statutory appeal ground. Such appeals have no connection to the actual contravention.