# ExternalTime

> The external reference clock the VideoPlayer observes to detect and correct drift.

## Definition

* **Type:** Field
* **Namespace:** [UnityEngine.Video](/engine/6000.0/script-reference/unityengine/video.md)
* **Assembly:** UnityEngine.VideoModule

```csharp
ExternalTime = 2
```

### Remarks

The VideoPlayer plays the video based on an external time source. External time sources include your own custom timers, or a system’s time. To set this, use [VideoPlayer.externalReferenceTime](/engine/6000.0/script-reference/unityengine/video/videoplayer/externalreferencetime.md).