TVH can not play m3u directly.
You need something like:
pipe://ffmpeg -loglevel fatal -re -i http://url2iptv.m3u8 -vcodec copy -acodec copy -metadata service_provider=IPTV -metadata service_name=name_service -tune zerolatency -f mpegts pipe:1
in http:// you put your path to the m3u.
service_name= - any name service.
service_provider= - your IPTV network name.
respectively ffmpeg must be installed in system.