Network Connectivity Is Causing Video. For example your video game might experience high latency which causes the game to freeze at times and not deliver a live update of the other players. For details on network requirements see Prepare your network for Meet video calls.

There are many different factors that contribute to Skype for Business Online Real-Time media audio video and application sharing quality that include the devices that are used the environment and the network connectivity. This causes some confusion with our users such as when a near-end hardwired user on a dedicated high quality network connection sees this pop-up and Im thinking it could be caused by the far end having a poor quality connection not the near end. If the Internet connection is still unstable another fix to try is deleting the network card from your computers Device Manager.
The call continues though all of this including voice and video.
Ive been trying to solve this mystery for quite a while. If playback doesnt begin shortly try restarting your device. Check the following items to improve the quality of the network. Restart the computer and let Windows reinstall the network card and its drivers.