Threadit is a Google product that when it launched I thought could have become a rival to Microsoft Flip. As feature-laden as Threadit is, it never really caught on and now Google is shutting it down in a few weeks. On December 19th Google is closing the doors on Threadit. If you have videos in it that you want to save, you need to download them sooner than later.
Alternatives to Threadit in the Google Workspace Environment
Some of what Threadit does can be replicated with other tools that are still available to Google Workspace users. Those tools include the screencast app for Chrome OS, office hours in Google Calendar, and Google Meet.