I have this weird issue has this same issue on beta version
And even in official version of the rom
When I am sending videos to anyone or setting any video as my status there is green tint on all my screen not sure why
its something with whatsapp and their conversions. i remember this used to happen with pixel devices too some years ago. the quick fix is recording UHD videos. its only 1080p videos that experience this bug and the screen recordings.
another alternative is to edit the video in kinemaster or some app and export it to send it across, its painstaking, time consuming and really shouldnt be happening considering i reported this bug during the 1st beta time to whatsapp and samsung!
samsung got back to me saying even they notified the bug to whatsapp about it and a fix is underway.
i still didnt hear back from whatsapp though, and ive given up. id frankly use telegram more!