: They do not contain actual audio or video content but act as a roadmap for media players to queue content.

: M3U files contain human-readable text that can be edited in any basic text editor like Notepad.

: The .m3u8 extension is used when the text is encoded in UTF-8, which is common for modern IPTV streaming. Duplex Play Media Player

Duplex Play (also known as Duplex IPTV) is a popular, user-friendly media player used to access M3U playlists across multiple platforms. How to Add IPTV Playlist in TV Browser