These are dedicated apps for Android and Smart TVs. You typically select "Add Playlist" and either upload the file or paste the URL.
Free or "VIP" playlists found on public forums often have a very short lifespan. They frequently stop working within days or weeks because the host servers become overloaded or the links are taken down for copyright reasons.
While the M3U file format itself is legal, using it to access unauthorized premium content without a subscription may violate copyright laws.
