Just listened to the ZFS on Linux episode. I was sceptical about watching a command-line narrative, but this was incredibly well executed, with episode transcript and mini-reviews of related sites. As the episode started, the speech pattern was so slow I wondered if it was a TTS robot aimed at non-English listeners, but then the voice quickly picked up speed to reach excited-hacker cadence.

How long does it take to write and produce each episode? Would you care to share the toolchain being used for screencasts?

I miss the lost promise of SMIL which would have allowed in-context video links to URLs for related sites, or deep-linking to related video snippets in other episodes. If your project continues, you will quickly grow a library which will benefit from cross-indexing. You will also find that a subset of content will need to be refreshed, as tools and environments change. Metadata for modular snippets will improve discovery, reuse and update.

Rails Tutorial has generated six-figure revenue from screencasts combined with an ebook, so there is precedent for monetizing self-service video training.