code: def move_right_down(self, action=None, channel=0,
                          vertical_speed=1, horizontal_speed=1):
          
  
          ret = self.command(
              'ptz.cgi?action={0}&channel={1}&code=RightDown&arg1=0'
              '&arg2={2}&arg3=0'.format(action, channel, vertical_speed)
          )
          return ret.content.decode('utf-8')
docs: Params:
              action           - start or stop
              channel          - channel number
              vertical_speed   - range is 1-8
              horizontal_speed - range is 1-8