Hello I'm using android 12 just updated 1/1/22 on galaxy s21 ultra UK. On EE,
When I take a video on my phone, the picture is amazing as tho it's there in front of my eyes, clear, vivid colours, bright. But once sent to FB and messenger the video is really dark. Grainy and looks like was taken with an old skool Nokia or Alcatel. I need help please as I'm an amateur wildlife and landscape photographer and these look terrible.
You are mostly recording in HDR10+ mode, and not converting the video before sharing. Try turning off HDR10+ in the camera settings>>Advanced Recording Options>>HDR10+ videos (Labs)
Might not even be that but that's my best guess 👍🏻 Good Luck and Happy New Year John.