The file name.
The video duration in seconds.
The size of the file in bytes.
The download status of the attachment file. See ChatDownloadStatus.
The video height in pixels.
OptionallastThe user ID of the operator that modified the message last time.
OptionallastThe UNIX timestamp of the last message modification, in milliseconds.
The local path of the file.
OptionalmodifyThe number of times a message is modified.
The path of the attachment file in the server.
The token to download the file attachment.
The local path of the video thumbnail.
The URL of the thumbnail on the server.
The secret to download the video thumbnail.
The download status of the video thumbnail. See ChatDownloadStatus
ReadonlytypeThe message type. See ChatMessageType.
The video width in pixels.
The video message body class.