See: https://core.telegram.org/bots/api#sendvideonote

        :param video_note: Same as ``photo`` in :meth:`telepot.Bot.sendPhoto`

        :param length:
            Although marked as optional, this method does not seem to work without
            it being specified. Supply any integer you want. It seems to have no effect
            on the video note's display size.

def sendVideoNote(self, chat_id, video_note,
                      duration=None,
                      length=None,
                      disable_notification=None,
                      reply_to_message_id=None,
                      reply_markup=None):
        """
        See: https://core.telegram.org/bots/api#sendvideonote

        :param video_note: Same as ``photo`` in :meth:`telepot.Bot.sendPhoto`

        :param length:
            Although marked as optional, this method does not seem to work without
            it being specified. Supply any integer you want. It seems to have no effect
            on the video note's display size.
        """
        p = _strip(locals(), more=['video_note'])
        return self._api_request_with_file('sendVideoNote', _rectify(p), 'video_note', video_note)