Some developers on PyPI have been discussing the Macaroon approach to authorization at Add support for API keys · Issue #994 · pypa/warehouse, and noted that a great Mozilla Tech Talk video on the topic seems to be gone:
https://air.mozilla.org/macaroons-cookies-with-contextual-caveats-for-decentralized-authorization-in-the-cloud/
It turns out the Internet Archive has the original blurb: Mozilla Tech Talk: Macaroons, and the 54-minute video of the “air mozilla” talk by Úlfar Erlingsson can just barely be dug out at Macaroons talk by Úlfar Erlingsson
Is there any chance that this classic content can be re-posted to make it more visible?