@frogzone dunno about the designer, but they are a very privacy-minded person doing everything via Tor.
As for fedi icons.. whether they get popular, find any use, all depends on.. everyone, I guess. There's no one that can authoritatively say "this is the icon". You may campaign for an icon's adoption, that's about it, no guarantees 😄
For Peertube you might suggest the icons in their issue tracker.
Nice animation added, though. 👍