New iPhone 12 models have the option to record video in the HDR format, a new Dolby Vision standard boosting color and contrast. However, most platforms (Facebook, Instagram, Tiktok...) are not compatible with this format yet. And currently, we do not support HDR video playback in our Inbox or workout comments.
To make sure your videos send properly and can be viewed by others, please:
Go to the "Settings" app on your iPhone
Choose "Record Video"
Then, turn off the toggle for "HDR Video (High Efficiency".
Please check out Apple's support page regarding HDR settings for more information: