Explanation
  1. Open sender page
  2. Press "Start" (sender) to use the local stream.
  3. Press "Call" (sender) to obtain the offer (SDP) and the possible connections (ICE) to the sender
  4. Copy the offer and the connections for the receiver
  5. Open receiver page
  6. Paste offer and the senders's connections from the sender in the corresponding fields
  7. Press "Answer" (receiver) to obtain the answer (SDP) and the possible connections (ICE) to the receiver
  8. Copy the answer and the connections for the sender
  9. Switch to sender page
  10. Paste answer and the receiver's connections from the sender in the corresponding fields
  11. Press "Handle Answer" to establish a stream
  12. Now, you're done..