Dan Callahan - The New Mobile Web: Service Worker, Push, and App Manifests - PyCon 2016

From a channel Lumen includes in full: The official PyCon US 2016 recordings: full talks and multi-hour tutorials by Python core developers and practitioners on the language, testing, packaging, data science and web development, selected by the conference's community review.

A 27-minute video from PyCon 2016's catalogue; the title names its topic.

Video by PyCon 2016, played through YouTube's embedded player.