I received a "youtubeSignupRequired" error
If you receive a "youtubeSignupRequired" error, Screencastify cannot find a YouTube channel associated with your Google Account.
A YouTube channel (not just a YouTube account) is required in order to publish a Screencastify recording directly to YouTube. Click here for instructions on how to create a YouTube channel.
Click here for instructions on how to connect your YouTube channel to Screencastify. You'll only need to do this once.