WebSocket is technology for providing two-way, real-time communication between a web browser and a server.

In this talk, Dion Misic gives a gentle introduction to the WebSocket protocol. He tells how it works, it's intended usage, and gives a number of examples where it can be used with Python and it's popular web frameworks.

You can watch the video on the freeCodeCamp.org YouTube channel (30 minute watch).‌