Thank you very much for coming back to me so quickly and completely understand regarding the guide/thread not being for this sort of thing but was also just curious as to whether Voukoder may suit some of my needs.
Please find link to the MediaInfo. I tried quite a few different combinations but so far still no luck with YouTube tagging them correctly.
https://drive.google.com/drive/folders/…tvW?usp=sharing
I will definitely look at AviDemux for trimming purposes. To be honest, ideally I didn't want to trim and re-encode the file through Premiere Pro but tried it as my original HDR capture that I uploaded to YouTube kept exhibiting frame drops at certain points in the clip that were not present when playing on any of my internal media players, but were only present once YouTube had finished converting.
I did have it happen to one of my other HDR clips at certain points but when I re-encoded from H.265 to H.264 and re-uploaded to YouTube it fixed the stuttering/fps drops.