# Watch together

**What it shows.** A room in which everyone watches one file in sync. The room service names
the file by its content hash in the room's signed policy; each page fetches it, checks it,
and keeps it at the room's position. Play, pause, seek and speed are controls each page
signs; each applies at one instant on the room's clock, for everyone. Every few seconds the
room's clock states how far each viewer is from the room.

**Run it.**

```sh
wai create my-watch --template watch-together
cd my-watch
wai dev
```

Open `http://127.0.0.1:8080/` in two tabs, press **Watch** in each, then **Play** in one.

**What you see.** Both tabs play the sample tone (`tone.wav`, made by `wai create`, a pitch
that steps up each second), pause together and jump together. Below the player, each page
shows its own offset from the room and whether everyone is in sync.

**Make it yours.** Put a `.webm`, `.mp4`, `.ogg`, `.mp3` or `.wav` file in the project and name
it in `wai.json` (`"watch"`), with its length in milliseconds (`"watch_ms"`) for anything
but a WAV file. Or run `wai dev --watch film.webm --watch-ms 90000`.

**With a coding assistant.** Run `wai setup-agent` in this directory: it writes the
instructions an assistant reads and connects it to WAI's tools.

**License.** Apache-2.0: the text is in `LICENSE`, and a project `wai create` makes from this
example carries it.