To use IPTV, you generally need two things: an (the link to the stream list) and a Player to run it.
: There are open-source projects like iptv-org on GitHub that maintain massive, legal lists of publicly available (FTA) channels from around the world.
: Most reliable M3U playlists come from paid IPTV service providers. Once you subscribe, they provide a unique M3U URL in your account dashboard or via email.
Searching for "Download IPTV2 M3U" typically refers to finding a playlist file or URL that allows you to stream live television channels via an IPTV player.