: M3U stands for "MP3 URL." While originally for audio, it is now the industry standard for organizing massive lists of streaming video channels.
The file is a multimedia playlist file designed for use with IPTV (Internet Protocol Television) services . It functions as a plain-text directory containing URLs that point to live TV streams, video-on-demand (VOD), or radio stations. Understanding the M3U Format
: Each entry typically consists of two lines: a metadata line starting with #EXTINF (containing the channel name and logo) and a second line with the direct streaming link.
To watch the content within tv_channels_alisson1520_plus.m3u , you must use a media player that supports IPTV playlists. How to import IPTV channels list from m3u list? - INFOMIR