Open the Screencastify extension, and click the "My Videos" icon.
Screencam+Webcam Recording
This will show the person speaking into the camera AND everything on the computer screen.
Webcam Recording
This will show the person speaking into the camera.
Screen recording only
This will include everything on a computer's screen. Great for students who wish to record a presentation or explain any digital work.
Click +New Assignment and add the details of your assignment.
In the "Select to share" dropdown menu, choose Google Classroom. You can also choose to receive notifications when a video is submitted.
Click Create & Assign when you're done.
Check the submitted Assignments in Google Classroom or in the Screencastify Submit dashboard.
The Screencastify Submit task will look like a typical Google Classroom assignment.
The students can also turn in their work directly in Google Classroom immediately after recording their video.