View Source ExTDLib.Object.InputMessageVideoNote (ExTDLib v0.0.4)

A video note message.

NameTypeDescription
video_noteInputFileVideo note to be sent.
thumbnailinputThumbnailVideo thumbnail; pass null to skip thumbnail uploading.
durationnumberDuration of the video, in seconds.
lengthnumberVideo width and height; must be positive and not greater than 640.

More details on telegram's documentation.