How do I know my camera and microphone will work?
Open seayora.com/meet/check — it is linked from every email about the call. It tests your camera, microphone, speakers, screen sharing and, most usefully, whether your network lets the call through at all. Everything runs in your own browser and nothing is recorded.
From the guide Booking a Call About Custom Pricing.
Before you join
There is a setup check at seayora.com/meet/check that tests your camera, microphone, speakers and network, and it is linked from every email we send you about the call. The one worth running is the connection test: office and hotel networks often block the direct route between two browsers, which nothing else on your computer will tell you about. It takes a minute, nothing is recorded, and nothing leaves your browser.
Read the whole guide: Booking a Call About Custom Pricing