code: def show(self, temp_file_name = 'ani.mp4', **kwargs):
          
          ## [NOTE] Make this method as a method of base class.
  
          ## [NOTE] This should be modified to prevent erasing other existing file with the same name.
         	assert type(temp_file_name) is str
   
          self.save(temp_file_name, **kwargs)
  
          ## [NOTE] Consider removing the temp file.
          
          ## [NOTE] Implement automatic showing.
          return HTML("""
          <video width="%d" height="%d" controls>
            <source src="%s" type="video/mp4">
            </video>
            """ % (640, 300, temp_file_name))
docs: ## Arguments:
          - 'args' and 'kwargs' will be passed to 'self.save()'