Paulius Cibinskas
There are many problems with video chat:
  1. Sometimes there are duplicates of same person's camera. This mostly happens when another person joins and there was a problem with someone's camera before join (spinner was shown).
  2. If something happens and camera stops working, your camera will not be visible for the whole call and instead everyone will see a spinner.
  3. Video chat window sometimes remain open even though call has ended (with spinners).
  4. You can't change your camera device during a call.