I've always said resi cctv (and some comm) is useless in most scenarios, have a look at all the cctv of van theft and break in's, every scroat expects it and covers appropriately.
The police are not interested in it, my sister in law had an accident last December, non fault and all caught on dashcam as clear as day. They got a letter 2 weeks ago saying they were suggesting knock for knock as there were no witnesses, they'd not even reviewed it. (I know dashcam footage is different but the sentiment is the same)