You can see some of David Beazley's presentations on YouTube. He presents regularly at PyCon and other conferences. He's also the author of Python Essential Reference and the editor of Python Cookbook, 3rd Edition.

One of my favorite presentations of his that gives a flavor of his instruction style is "Python Concurrency from the Ground Up" at PyCon 2015:

https://www.youtube.com/watch?v=MCs5OvhV9S4

I saw this one live, but I think the recording is good quality. He live codes a Python 3 highly concurrent, generator-based TCP server that does fibonacci calculations, if I recall correctly.

One of the YouTube comments gets it right, it's "The Jimi Hendrix of Python".

The prior course I took with him was called "Writing a Compiler (in Python)". I think I took it the first time it was offered, in 2012. In that course, we implemented a programming language that was a (very small) subset of GoLang, by building the entire parser/compiler in Python. So, in 5 days, you learned all about compiler theory, and wrote your own compiler (in Python) for this GoLang-style language. The last day, we peeled away the layers of the onion for how PyPy is implemented under the hood, using our newfound compiler toolchain knowledge. It was really fun. He has a very engaging presentation style and a fascination with computing that is infectious. You leave the course energized and happy to be a programmer.