'Could not connect to room'? Try closing and re-opening Vivi. If you're using a Mac, check that Chrome has local network access. Then open an IT request or call the IT office.
No sound? Check the volume on your video player (eg. YouTube), the volume and output settings on your device, then the volume on the TV/Projector remote. If you're accessing Vivi through Google Chrome or a Chromebook, make sure you select the option to share audio when sharing your screen.
Using a streaming service and the video doesn't play? Consider using the Play Content option instead of sharing your screen. If you still have trouble, reach out to IT as some streaming services are not compatible with wireless streaming.
Too much lag/delay? Up to half a second delay is normal, but if you are consistently getting unbearable lag reach out to IT as there are some settings we can tweak on your device.
Stuttering video? Try playing the video using 'Play Content', or if you are sharing your screen enable 'Movie Mode' which adds a 3 second delay to the stream to allow the video to 'catch up'.