Any very user friendly resources on the Baum-Welch algorithm? I'd like to understand the Baum-Welch algorithm. I liked this video on the Forward-Backward algorithm so I'd like a similar one for Baum-Welch.

I'm having trouble coming up with good resources for Baum-Welch. Any ideas?
A simple web search leads to a whole lecture by Christopher Lee. I did not watch it entirely, but it seems to be a slow, thorough take on the algorithm with an example walk-through on paper similar to the video you link (if longer).