WSS relay for signaling is user for estabising connection betwen sender and reciver. It doesn't relay actual data (audio/video). You can specify yor own server or use Mysheus'.
Token wss relay is used for defirintiating users of Mysheus' public wss relay. You can ask for one from Mysheus. In the future will be automated method. If you use custom wss relay this field will be trasmited to wss relay as "token" GET parametr.
Channel is alfanumeric value to defirinciate pairs of senders and recivers.
Reciver and sender must be on same WSS relays, same tokens and same channels. You can use different channels to use two or more pairs of sender and reciver at same time.
Start transmission:
Video preview (if transmited):