If Screencastify is unable to detect your webcam, the extension will not be able to capture your webcam or embed your webcam within your recordings.
Here are a few steps you can take to resolve the issue.
Step 1: Test your webcam at cam-recorder.com
If you are able to view your webcam, Google Chrome can access your camera. If not, there is something blocking Chrome's access.
Step 2: Restart Chrome
It's possible for Chrome to lose access to your webcam. This can often be fixed by simply restarting Chrome.
Step 3: Restart your computer
Sometimes software/patches installed on your device can disrupt webcam access until a restart.
Step 4: Uninstall and reinstall Screencastify
Click here for instructions on how to uninstall Screencastify.
If you save your recordings locally (and not to your Google Drive), they will be permanently deleted when you uninstall Screencastify. Please be sure to export them before you proceed.
If none of the above steps work, then the problem may lie within your device or operating system. We'd recommend searching for solutions based on your operating system. Here are some troubleshooting docs that may help: