Although the server can produce HLS with a variety of video and audio codecs (that are listed at the beginning of the README), not all browsers can read all codecs.
You can check what codecs your browser can read by [using this tool](https://jsfiddle.net/4msrhudv).
You can check what codecs your browser can read by [using this tool](https://jsfiddle.net/ufemo2p7).
If you want to support most browsers, you can to re-encode the stream by using the H264 and AAC codecs, for instance by using FFmpeg: