I don’t really understand the technical details of compression schemes, but my piece of anecdata is this: in my experience installing/maintaining CCTV systems,

I don’t really understand the technical details of compression schemes, but my piece of anecdata is this: in my experience installing/maintaining CCTV systems, using H.265 over H.264 approximately halves the used bandwidth and storage for the same video quality. This is much more pronounced in static/less active scenes, but is still a measurable benefit in highly active scenes.