code: def move_left(self, action=None, channel=0, vertical_speed=1):
          
          ret = self.command(
              'ptz.cgi?action={0}&channel={1}&code=Left&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 1-8
  
          The magic of move left 1x, 2x etc. is the timer between the cmd
          'start' and cmd 'stop'. My suggestion for start/stop cmd is 0.5 sec