I didn't know the latest Pi did H265. That's quite impressive. Bet it runs hot. My laptop has an 8th gen i5 and seems to support H265 recording. I tried a section from "Life on earth" which was very impressive until it got busy with a flock of birds taking off. Then it was terrible: all blurred with blocky artefacts. I imagine it would do better transcoding a video where it isn't working on the fly.