I'm a huge fan of Asciinema, and this is awesome work.

Regarding the live streaming feature, I hacked a similar thing on top of s2.dev streams[1] (disclaimer: I am a co-founder), which could alleviate the need for a relay in this architecture[2]. Naturally showing off `btop` was the highlight for me as well :-D.

[1]: https://s2.dev/blog/s2-term [2]: https://docs.asciinema.org/manual/server/streaming/#architec...