If you have problems with video stability and the video stops, there are three main reasons for this.

Camera

The camera you are using is not connected properly or has a defect.

Check the status of the camera you are using and make sure that works properly with other softwares.

Internet connection

The internet connection is not good enough. (Network Issues)

In this topic you can see how to check the status of your classroom speed connection: Check Connection Quality

Check the network requirements on this topics: Network Requirements

CPU

Your CPU load may be too high, to reduce the CPU consumption we recommend:

1. Close browser tabs

2. Close programs that may consume a lot of CPU