While it may not be immediately apparent how to use them, read on to discover what an M3U file is and how to access it. If you’re an IPTV user, you may have come across M3U files. Mainstream TV providers like Disney are now entering the market, introducing a wide range of entertainment choices that were not available before. And it’s likely that you will continue to use it in the future because the IPTV industry is growing rapidly. You have probably used IPTV, whether or not you are familiar with the term.