360 R encodes with h.265 in what modes?

I'm trying to speed up my workflow with smaller file sizes in editing.

Specs say it uses h.264 and h.265 and I'm just trying to figure out which videos will actually benefit from being encoded into h.265 before use in a project (reduce file sizes without losing quality but improve editing speed).

But when I look at the files (.mp4) I can't find any indicator as to which ones were encoded with h.265 so I don't know if I'm wasting time and effort.

I'm using mosty 5.7K 360 and the 1" mod at 5.7K wide angle. Is there an easy way to see what these were encoded at or does someone know? I want to assume that the high res formats are using h.265 but assumptions... well, you know...