Document that will be downloaded by the telegram servers
inputMediaDocumentExternal#fb52dc99 flags:# spoiler:flags.1?true url:string ttl_seconds:flags.0?int = InputMedia;| Name | Type | Description | 
|---|---|---|
| flags | # | Flags, see TL conditional fields | 
| spoiler | flags.1?true | Whether this media should be hidden behind a spoiler warning | 
| url | string | URL of the document | 
| ttl_seconds | flags.0?int | Self-destruct time to live of document | 
| video_cover | flags.2?InputPhoto | Custom video cover. | 
| video_timestamp | flags.3?int | Start playing the video at the specified timestamp (seconds). |