[dzejms]

Another issue that I don't understand, if in IPTV SIMPLE CLIENT I have already put the M3U list there is no need to put it in the IPTV ARCHIVE settings, right? And second question, what does ARCHIVE FORMAT mean? What function does it have?

1. It is required since Kodi 20 which introduced addons instances. This mean my addon is not able to access stream URL from IPTV Simple Client as Python API does not provide such as function yet. AFAIK it won't until Kodi 21. That's the reason why my addon requires the same URL/M3U file in its settings.
   
2. Does you IPTV provider support archive/catchup? Do you know what is the format of archive (what's the query?) My addon natively supports 3 options:
   • PlusX - archive query => &utc={}&lutc={}
     
   • Teleelevidenie - archive query => ?utc={}&lutc={}
     
   • Custom - this would be most likely your case. You wound need to figure out or ask your provider.
     
3. Did you install ffmpeg? Did you point the addon to ffmpeg binary?