It's done! @kojote and I's first livestream, which clocked in at almost four hours (!), condensed into under 20 minutes! With captions!
Getting a setup working to finish editing the video was a Fun Adventure -- hopefully future supercuts will not take quite this long. It will help if Apple ever decides to fix the bug they introduced recently that keeps disconnecting my external HDD, sometimes when I am in the middle of using it.
Please enjoy it! Tell your friends!