M3U8 is a file format that acts as a playlist for multimedia content and is commonly used for HTTP Live Streaming (HLS). Think of it as a table of contents that tells a media player where to find the actual audio or video files.
Just input the link that leads to the M3U8 stream and it should work in seconds. If not, you might want to check your internet connection or make sure the link you input is correct. It the issue persists, please contact the website owner.