Screencastify is one of the most popular screencasting tools for educators, and for good reason! It is a free Chrome extension that enables you to record your screen, add voiceover audio, and embed a webcam video. There are also some annotation and editing tools built-in. This is incredibly helpful for distance learning since it helps teachers provide students with much needed asynchronous video instruction that is tailored to their needs and interests.
Here is a quick tutorial to help you get up and running with Screencastify! (Direct link to video here)