Theoretically, in the US dashcam, CCTV, and similar automated recordings are not copyrightable. In the US you can only copyright creative expression. However, the question hasn't been answered in court, yet, AFAIU.

That doesn't stop people from treating automated recordings as if they were copyrighted, though. Especially for media companies, licensing is standard operating procedure. Even if a media company's lawyers believe something isn't actually copyrightable, if the licensor and licensee believe it is, and especially if distribution outlets (e.g. YouTube) treat it as such, then it all works out.

In some other countries automated footage is copyrightable, AFAIU, but it varies.

> In any case, any country that decides neural network generated media isn't copyrighted then faces a major, and probably impossible, problem of trying to prove it wasn't made by a human.

In the US the initial burden is on the person claiming a copyright violation. In court that is met by simply showing a certificate from the Copyright Office. In fact, it's actually a requirement--you can't sue in court to enforce a copyright claim with a certificate. But in getting the certificate you would be making a declaration that it was made by a human.