An uploaded media object.
| Property | Type | Description |
|---|---|---|
| expires_after_secs | Integer | Seconds until the media expires if unused. |
| id | String | Unique identifier of the media; use it in `media.media_ids` when creating a Tweet. |
| image | Media_Upload_Image | Image details. |
| media_key | String | Media key of the uploaded media. |
| processing_info | Media_Upload_Processing_Info | Processing state (video/GIF). |
| size | Integer | Total size in bytes. |