These Highwire videos are shared here because I make copies for personal use and as long as that is the case, why not share them? This is not an endorsement per se, but they contain useful information that can be independently verified, and source references are provided. I expect that the videos will remain available here for for a week or two each. You can view the entire archive at Del’s website, the URL of which is provided within the video.
Note: you might have to adjust the volume using the viewer controls when you first start.