Instructions:
Go to https://edpuzzle.com and log in / sign up as a teacher
Search for relevant content and then click on the "Share" link:
Click on the "Copy link" button next to "Embedded code" on the window that comes up.
Or, create/edit your own content, assign to a class, then click "Share assignment:"
Click on the "Copy code" button next to "Embed code."
Finally, paste the code into the Embed field in your formative!