If you want high-quality, stable access to BBC Earth content, several official platforms offer free or low-cost streaming legally: How do I watch live TV on BBC iPlayer?
BBC Earth is a premium channel. Watching it via an unauthorized M3U8 link is copyright infringement. While individual viewers are rarely prosecuted, accessing these streams is a violation of your ISP’s terms of service and could result in warnings or throttled speeds. bbc earth m3u8 link
For the cost of a coffee per month, you can subscribe to a legitimate service that includes BBC Earth. You will get better quality, no buffering, and the peace of mind that you aren’t inviting malware onto your device. If you want high-quality, stable access to BBC