Ask HN: Best Talks of 2020?
Matti Picus' talk on Getting Involved with NumPy.  It's one of the main libraries used in data science, so the talk is very useful.  He discusses its start, development, governance, how to contribute and with an example of a pull request.  It's a great resource on getting started with open source in python.  https://youtu.be/lHJqOE5j6xE