[piotrasd]

to be honest something is wrong I tried from 0 up to 5 for me its looks same ... nothing changed  
and also tried switch off - and still same picture


Update
@fritsch 
Ok i tested around 1h everything because I was think that issue is only in LiveTV 
but I tried switch off and on and change value from 0 to 5 with no any change on picture, but with any other movies MKV that's work - like 0.10 is ultra bright picture.



but next I recorded something and play from Movies and same issue - so im think maybe Kodi don't recognize HLG ? and don't use tone mapping ? 

here sample: 
https://ufile.io/h1sow