These formats are "manifest" or "playlist" files. They don't contain actual video data; instead, they provide instructions to a video player on where to find the video segments and how to play them.
Some EPG-supported players allow you to pause or rewind live broadcasts. Best Video Players for M3U8, MPD, and EPG video player mpd m3u8 m3u epg link
The older predecessor to M3U8. While originally designed for audio (like MP3s), it is still used by legacy IPTV services to list multiple channel links in one file. Enhancing Your Experience with EPG Links These formats are "manifest" or "playlist" files
A highly customizable Windows-only player known for smooth 4K playback and advanced settings for power users. video player mpd m3u8 m3u epg link