@FTLApls the video doesn't really help so I'd keep this very simple, just make a one-line representation as follows:
Dear Transport for London,
The alleged contravention did not occur.
Yours faithfully,
Let us know when you get the notice of rejection and we'll help you sort it out at the tribunal. Make representations on the TFL website and make sure to keep a screenshot of the confirmation page (do not send representations in the post).