I haven’t heard anything about David Attenborough talking about plant based stuff so I won’t dispute it but he did help found and fund the zoology museum in my town, one that specifically tries to educate people on the dangers of climate change and making species endangered. From what I’ve seen of his filming they’re pretty conscious about not leaving any waste behind too.
As everyone has said, lossless compression might not have great ratios, but if it’s still worth it I recommend dwarfs as it creates read only mountable filesystems with minimal setup https://github.com/mhx/dwarfs