got a small update. With the new versions of the operation systems MacOS Monterey and iOS 15 I need to check again on which devices HDR is supported. There are some strange changes.
For example I could always show my demo files on the iPhone 11 Pro. Now I got a new iPhone 13 Pro and the same page does not work anymore.

I also got the new M1 MBP with an XDR display, so I decided to update the subdomain hdr.toodee.de with some more detailed information on which device and with which browser or app this page actually works as intended.

Check out the updated page on hdr.toodee.de.