Most likely your internet connection is slow. Slower upload speed will cause lag and distortion in the room. Please take a look at our System Requirements to learn more about our bout minimum requirements and ways to increase your speed. The upload speed provided by most broadband providers is often much slower than the download.
Reducing the number video and audio streams may help as does improving your router. New routers are able handle faster connections and more concurrent traffic.
Another possible issue maybe the camera you are using. You may need a new one. Please visit our recommended hardware section.