Swiftfin: 4K HEVC Playback not working on iPhone Xr, iPad 7

I am currently testing the app with my devices. I have an iPad 7th Gen and an iPhone Xr, both running the atm newest ios/ipadOS release (14.6).

On both devices, AV1 playback does not seem to work. When trying to play back the “Summer Nature” 4k file from (https://www.elecard.com/videos), playback does not start. On the server side I see that the app is requesting direct play, which I would assume is correct since the VLC backend should support AV1. Same thing happens with the 1080p version of that file.

I also cannot play 4k HEVC files. Media info of one affected file:

Title4K HEVC HDR
CodecHEVC
ProfileMain 10
Level153
Resolution3840x2160
Aspect ratio16:9
InterlacedNo
Framerate23.976025
Bitrate63173 kbps
Video rangeHDR
Color spacebt2020nc
Color transfersmpte2084
Color primariesbt2020
Pixel formatyuv420p10le
Ref frames1

This movie can be direct played by the iphone using the web-app with the native player option enabled.

Anyways, thanks for the amazing work so far!