Does video evidence collect itself?

An interesting post from a fellow blogger begs an interesting question. With the video security industry focussing on analytics and faster/smarter search capabilities - this still leaves the problem of collection and processing for court purposes. 

Video evidence has to be collected and properly preserved somehow - by someone. With the recorders only retaining data for X amount of days before recording over themselves, it has to be done in a timely manour or its gone forever. Add to that the proprietary nature of these systems - and the problem multiplies.

Food for thought. Yes, CCTV is great. But does video evidence collect itself?