Ok. I’m not an expert but not sure. Perhaps there is something in the structure of the m3u that channels doesn’t like. Maybe the Devs can take a look. Here’s the text of it:
#EXTM3U
#EXT-X-VERSION:4
#EXT-X-STREAM-INF:BANDWIDTH=1564000,CODECS="avc1.64001f,mp4a.40.2",RESOLUTION=960x540,FRAME-RATE=25.000
3/prog_index.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=414000,CODECS="avc1.640015,mp4a.40.2",RESOLUTION=512x288,FRAME-RATE=25.000
1/prog_index.m3u8
#EXT-X-I-FRAME-STREAM-INF:BANDWIDTH=1500000,CODECS="avc1.64001f",RESOLUTION=960x540,URI="3/iframe_prog_index.m3u8"
#EXT-X-I-FRAME-STREAM-INF:BANDWIDTH=350000,CODECS="avc1.640015",RESOLUTION=512x288,URI="1/iframe_prog_index.m3u8"