[learningit]

The log states, that a demuxer can't be created. The system is missing something to support this kind of video format on the apple device.

I know nothing about YT live streams, but I have found that SSL support for HTTPS playback is lacking in a number of Kodi builds.
If you turn on debug logging and enable curl verbose logging when trying to play the YouTube video posted in the forum you may see something like this where it fails to create the demux in the debug log:
15:06:16 T:2914669632 NOTICE: Creating Demuxer
15:06:16 T:2914669632 DEBUG: ffmpeg[ADBA5440]: https protocol not found, recompile with openssl or gnutls enabled.
15:06:16 T:2914669632 DEBUG: Error, could not open file https://

This is caused by not having a version of ffmpeg in your build which has gnutls or openssl compiled in and hence no https: support. Happens all the time with Android and Rasp PI builds, plays fine on Windows builds. Another possible error on a live stream is that the HTTP stream is trying to seek to 0 - but this would fail on all platforms.