The quality of video and audio during live classes may also depend on your internet connection. If the connection is poor, it will have an impact on the video quality. Quite often the quality improves after the class has been on for a while.
Audio takes less bandwidth than video, so audio should always work. Ideally the minimum speed required is 1 Mbps with low latency. You can test your local network speed with a tool like Speedtest.
To ensure good streaming quality during live and recorded classes, and to control your mobile data usage we recommend to you use WiFi when possible.