Out of context, “a power button” is really funny to see advertised as a feature.

I’ve been using NewPipe exclusively for about 4 years now and I’m very, very happy with it. I take background audio playback, downloading, adblocking, sponsorblocking et.c. for granted now and often forget how crippled the vanilla YouTube experience is.

Your comment got me curious so I had a look.

From their FAQ:

Will Magic Earth be Open Source?

No; since it is also used commercially (we have a paid Magic Earth SDK for business partners), we cannot make the code public.