I think this is a great idea @glyph. I'm really fond of video as a format for giving people insights into how things work.
I've talked with @piet about doing a series which is a tour of the work he did making an Android app using Go / Rust / kotlin for example
FWIW I've used asciinema for years and I dig it. My only complaint is that I think it's supposed to look like "ASCII cinema" but my brain always parses it as "ASCII enema".