Flipgrid is a simple, free, and accessible video discussion experience. Create a discussion Topic. Share it with your learning community. Learners record and share short videos with you and your class.
Make sure to set your flipgrid boards to private with allowed emails. See here for an example.
When creating a topic, make sure to click "more options" to see these controls for the topic and videos.
Want to have students record a response but NOT see the other students' videos? When setting up your flipgrid, turn on Video Moderation.