I stand corrected. This cannot be used by police at all. A police officer would have to be present at the time of the video and not reliant upon that video for observation of the criminal act. If the officer requires use of the video then that video would require a warrant prior to its viewing by law enforcement.
Edit.
I stand corrected. This cannot be used by police at all. A police officer would have to be present at the time of the video and not reliant upon that video for observation of the criminal act. If the officer requires use of the video then that video would require a warrant prior to its viewing by law enforcement.
https://en.wikipedia.org/wiki/Plain_view_doctrine