An image, video or animated GIF attached to a Tweet.
| Property | Type | Description |
|---|---|---|
| alt_text | String | Alternative text description. |
| duration_ms | Integer | Duration in milliseconds (video). |
| height | Integer | Height in pixels. |
| media_key | String | Unique identifier of the media. |
| preview_image_url | String | URL of the static preview image (video/GIF). |
| public_metrics | Media_Public_Metrics | Public engagement metrics. |
| type | String | Media type: `photo`, `video` or `animated_gif`. |
| url | String | Direct URL to the media (photos). |
| variants | Available playback variants. | |
| width | Integer | Width in pixels. |