H265 for the way it smooths its blocks and banding (esp the clocktower shot w/the moon moving behind it). Fast areas of the waterfall shots also highlight H264's sharper blockiness making for an uglier presentation whereas H265's smoothening calls less attention to itself in high motion, hard to encode areas.

But all three have some really bad judder(?), esp the very last clip. Watching the water is painful. 25fps mismatch w/source to blame? Are all the sources 24fps? Mix of 24 and 29.97fps?

My M1 Pro should be able to do smooth decoding, though the browser embed might mess with that.