I viewed the source but couldn’t figure out what to do. Thanks!
What I did was to use the Chrome Inspector to view the IFRAME element housing the video player. I grabbed the IFRAME's URL and opened it in another window to watch the show and get my ration of Schadenfreude (I don't have JS disabled for jwplatform.com, so the video plays when opened in a stand-alone tab).
When I saw your post, I decided to go back and try it again, this time watching the player's network traffic. Modern video players are designed to adapt to conditions, such as viewport size and network conditions. Bigger window, select a higher-resolution stream. Too slow buffering, downgrade the resolution. Making this work requires coordination with the server before the actual media downloading begins.
I opened the JavaScript console, selected the Network tab, and pressed the XHR button to cut down the bedlam. Then I reloaded the tab to take it from the top. Sure enough, one of the first things it did was to download that JSON I posted. That was all I needed to see.