Why play chess over video
Online chess removed the person. You get a rating, a clock and a username, and the game is the same game whether the other side is a grandmaster, a stranger in another timezone or a piece of software. Nothing that happens between the moves survives.
Video puts that back. You see the pause before a blunder, the face when the fork lands, the shrug at a lost endgame. People say good game and mean it. It turns a session into something closer to what chess is across a real board, which is a conversation with the pieces in the way.
What you need to play chess on video
A browser and a webcam. ChessChat runs in Chrome, Edge, Firefox and Safari, on desktop and on phones, and the video uses WebRTC through LiveKit, so there is nothing to install and no plugin to allow. If you want it on your home screen it can be installed as an app, but that is a convenience, not a requirement.
The camera is how ChessChat works, so it stays on. If someone walks into the room you can switch it off for a moment and switch it back on, and the microphone has its own toggle you can use freely. What is not allowed is playing on with the camera off, or game after game without it. If you want chess without a face there are other sites for that, and no hard feelings. The point here is that the person is there without being arranged.
Your camera stays yours
Camera and microphone streams are transmitted live to your opponent and are not recorded or stored. There is one deliberate exception, and it exists for safety rather than for us: when a player reports somebody, a single still frame of the reported player's video is captured so a human can act on the report. That is the whole of it, and it is written down in the privacy policy rather than only here.
Who can see you is equally narrow. Your opponent, always. In a lobby or tournament game, the host may be permitted to watch the game they are running. Nobody else can attach to a game they are not a party to, which is enforced by the server on every connection rather than by hiding a button.
How it differs from a normal chess site
The usual answer to playing chess with video is two apps: a chess site in one window and a video call in another, with a link to send, a lobby code to read out and two clocks that do not know about each other. It works, and almost nobody bothers twice.
ChessChat is one app doing both. Pairing, the board, the clock and the call are the same session, so the video is simply on when the game is on. Games from matchmaking are rated with a Glicko-2 rating, so playing face to face costs you nothing in the part of chess that keeps score.