FYI, there's a (roughly) 1 minute gap in the Week 4, Part 5 video, starting at 13:03 and ending at 14:07. This was the result of an editing error on my part.
The clip leading into the gap and the clip coming out of the gap connect, and no material is missing.
I just wanted to make an announcement about this in case there was any confusion or anyone mistakenly thought the video was over at 13:03.
(Hat tip to the two students who drew my attention to this issue in Slack!)