Since Oct 2022 there are a limit of 10 screencasts. Users can record/download/upload to their drive and then delete in Screencastify to get around this. Or use Quicktime on the Mac. See a video on Quicktime further below.
Students can use Screencastify to:
Demonstrate learning
Explain thinking
Capture Assessment As Learning thinking for peer feedback / self-reflection
These clips can be submitted to the Google Classroom, shared via drive, emailed and uploaded to youtube for access