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# play

> play method for the RoomSession class.

### play

* **play**(`params`): `Promise<RoomSessionPlayback>` - See [RoomSessionPlayback documentation](/docs/browser-sdk/v3/js/reference/video/room-session-playback) for more details.

Starts a playback in the room. You can use the returned [RoomSessionPlayback](/docs/browser-sdk/v3/js/reference/video/room-session-playback) object to control the playback (e.g., pause, resume, setVolume and stop).

#### Parameters

**`params`** `object`

Object containing the parameters of the method.

---

**`url`** `string`

The url (http, https, rtmp, rtmps) of the stream to reproduce.

---

**`volume`** `number`

The audio volume at which to play the stream. Values range from -50 to 50, with a default of 0.

---

**`seekPosition`** `number`

The starting timecode in milliseconds for playback. Defaults to `0`.

---

**`positions`** `VideoPositions`

Positions to assign as soon as the playback starts. You can use the special keyword `"self"` to refer to the id of the playback.

---

**`layout`** `string`

Layout to change to when the playback starts.

---

#### Returns

`Promise<RoomSessionPlayback>` - See [RoomSessionPlayback documentation](/docs/browser-sdk/v3/js/reference/video/room-session-playback) for more details.

#### Permissions

* `room.playback`

You need to specify the permissions when [creating the Video Room Token](/docs/apis/rest/video/room-tokens/create-room-token) on the server side.

#### Example

```javascript
const playback = await roomSession.play({ url: "rtmp://example.com/foo" });
await playback.stop();
```

> play method for the RoomSession class.