While I have not had experience with using these products for classes, you do have a few options that I can think of that are available for free. - Discord Go

While I have not had experience with using these products for classes, you do have a few options that I can think of that are available for free. - Discord Go Live streams were just increased from 10 to 50 participants. I don’t know if there is any way to record those. - Twitch. One-way streams with chat. Note that stream recording must be turned on in your account settings, and I believe that recordings are only kept for seven days in most cases, but can be exported to a YouTube channel. - Skype. These can be recorded. - YouTube live streams may also be useful for one-way streaming with chat. Streams can easily be hosted from the YouTube mobile app (phone number verification might be required). Good luck with your classes!