If someone is trying to get an m3u8 link for BBC Earth, they might be in a region where it's not available, or they want to record it via a TV tuner. But maybe using an online TV provider like Sling, Fubo, etc., but those also have official services.
I should make sure the guide doesn't facilitate piracy but instead helps users who have a legal right to access the content. It's a fine line to walk. Maybe provide instructions only for scenarios where the user already has a subscription and wants to, for example, record a show for personal use without downloading content illegally. bbc earth m3u8 link
So the guide should first clarify the legal options: check if BBC Earth is available on Freeview or via the BBC Player, or via international partnerships depending on the region. If they have a subscription to a service that provides BBC Earth, they could use a streaming app and then use a tool like VLC to open the stream. If someone is trying to get an m3u8