Threadit is a Google product that I thought when it launched could become a competitor to Microsoft Flip. As feature-packed as Threadit is, it never really caught on and now Google is shutting it down in a few weeks. On December 19, Google is closing the doors on Threadit. If you have videos in it that you want to save, you should download them sooner rather than later.
Alternatives to Threadit in the Google Workspace environment
Some of what Threadit does can be replicated with other tools still available to Google Workspace users. Those tools include the Screen Cast app for Chrome OS, Office Hours in Google Calendar, and Google Meet.
How to Record a Screencast in Chrome OS