These are optional and billed by the provider you choose, not by us. Turn them on when your community needs them, not because they are available.
Real-time video and audio chat can be powered by Twilio, Agora or Millicast. Live video streaming runs through Agora. SMS notifications can be configured through Twilio, BulkSMS or Infobip/Msg91. All are configured from your admin panel. Reference documentation
How to choose: pick the provider you or your technical helper already have an account with and can debug. Familiarity beats feature comparison for something you will touch twice.
Before enabling video, check FFMPEG. It converts uploaded video to MP4 and is required if members will upload other formats. Enable it under Admin Panel → File Upload Configuration → FFMPEG System Settings, confirm the path, and run the built-in debug check.
Budget realistically. SMS is priced per message and scales with your member count and how chatty your notification defaults are. Review those defaults before switching it on for everyone.
A reasonable sequence: launch without any of these. Add SMS only if members are missing time-critical notifications. Add video only if people ask.