Why does my video uploaded to iPhone Photos to OneDrive lack vibrancy when viewed on iPhone?

After uploading a video from iPhone Photos to OneDrive I noticed the vibrancy of the video had substantially changed (e.g. greens were substantially less green, blues less blue). While I would expect a change when viewed on a different device eg PC via Windows, I would not expect a change when viewing the same content on the same iPhone device via the OneDrive app. Why is this happening? Background: For those who might wonder why I'm doing this, it is because the content is rarely accessed and I want to free up some iCloud space. OK, I think I've got a major part of the explanation. My original upload was done without setting Options>"All Photos Data" before sharing. I have checked with [MediaInfo](https://mediaarea.net/en/MediaInfo/Download) . When exported with "All Photos Data" set, it seems to have been converted to: - AVC instead of using HVC1 codec - Has dropped Dolby Vision - Has dropped from 10bits to 8bits bit depth It looks much closer to the original now, however, it still looks a bit lower brightness when opened in OneDrive. On my Windows machine, it looks much closer to the original also, but I realise I have sacrificed efficiency and some bit depth of the original.