Yes, a video or photo might help corroborate the witness; ideally the judge and jury will have copies of photos and a screen and the means to see a video, but that can be sorted out at court. They can 'make do' with just the one ( as they have to do with exhibited objects!). Strictly speaking , a video or photo has to be agreed, as a true image, with the prosecution or proved by the person who took it giving evidence to that fact. There are ways around this problem sometimes. The solicitor can see to that.
The neighbour can say what the lighting is ; what street lamps etc.; He will be asked some questions about it, no doubt, but the solicitor will take a 'proof' (statement) from him and ask him to include that sort of information, to give counsel something to work with.