I accidentally blocked Screencastify from accessing my webcam and microphone

If you camera and microphone are blocked in Google Chrome settings, your record button may look like this:

To allow access to your webcam and microphone in your Google Chrome settings:

1. Copy and paste "chrome://settings/content" into your browser
2. Under "Permissions" select "Camera"
3. Under "Customize Behaviors" You should see "Not allowed to use your camera" 
4. Locate Screencastify and click on the small arrow to the right
5. Under "Permissions" click on the dropdown next to "Camera"
6. Choose "Allow"
7. Under "Permissions" click on the small arrow next to "Microphone"
8. Choose "Allow"

Now you're all set and ready to record 🎉