breadpub

This li’l CC0 shell script wrapper on gcap, dos2unix, perl, sed and pandoc takes a YouTube URL or video id and outputs an epub. Only works on videos that have transcripts, obviously.

To get the script,

git clone https://idiomdrottning.org/breadpub

You can find cgap here, if your distro doesn’t carry it.

Update

Milo Fultz made a similar app for the same purpose.