Downloading Panopto videos with Firefox

To download a video hosted on Panopto, such as a class lecture, you can take the following steps in the Firefox web browser:

Right-click on the video in Panoptoo—you may need to click on the small video in the upper, left-hand side of the window rather than the one on the right side of the window—and select "Inspect Element (Q)." In the "Search HTML" field, type .mp4 and hit Enter—this presumes the video is an MP4 video.
You should see the area in the HTML code where the MP4 file is referenced highlighted.

Right-click on the highlighted area and choose "Copy" then "Outer HTML."
Then paste the information copied into the clipboard into Microsoft Notepad or some other text editor, depending on your operating system and preferred editor. You should see the URL for the video listed in the content pasted into the editor. Copy the URL starting with the "https" up through the ".mp4"—don't copy the information after the ".mp4."
Paste the copied URL into a browser tab. You can then right-click on the video in that browser tab and select "Save Video As" to download the video to your local system. You can give the video a more meaningful name than the long string of hexadecimal digits used for the name.

Alternatively, you can take the following steps, instead to download the video:

Right click on the video—you may need to click on the small video in the upper, left-hand side of the window rather than the one on the right side of the window—and select "View Page Info."
In the Page Info window, click on "twitter:player:stream" to highlight that meta tag.
Then right-click on the highlighted entry, and chose "Copy."
You can then paste the copied URL into a new tab in the browser or the same tab. You will then have the option, when you right-click on the video, to select "Save Video As..." to download the video to your local system.