state do not change in a FSM in python using transitions library

I'm trying to replicate the code from this talk:

class Video:
    ## Define the states
    PLAYING = "playing"
    PAUSED = "paused"
    STOPPED = "stopped"
    
    
    def __init__(self,source):
        self.source = source
        
        transitions = [
            
            {"trigger":"play","source":self.PAUSED, "dest":self.PLAYING},
            {"trigger":"play","source":self.STOPPED, "dest":self.PLAYING},
            ##
            {"trigger":"pause","source":self.PAUSED, "dest":self.PAUSED},
            ##
            {"trigger":"stop","source":self.PAUSED, "dest":self.STOPPED},
            {"trigger":"stop","source":self.PLAYING, "dest":self.STOPPED}
            
        ]
        
        self.machine = Machine( 
        model = self,
        transitions = transitions,
        initial = self.STOPPED)
        
        
    def pause(self):
        print ("pause")
        
    def play(self):
        print ("play")
        
    def stop(self):
        print ("stop")

But one I call it, it does not work:

test = Video("some text")

that returns a warning:

2020-09-27 17:25:50,255 [11472] WARNING  transitions.core:828: [JupyterRequire] Model already contains an attribute 'play'. Skip binding.
2020-09-27 17:25:50,259 [11472] WARNING  transitions.core:828: [JupyterRequire] Model already contains an attribute 'pause'. Skip binding.
2020-09-27 17:25:50,260 [11472] WARNING  transitions.core:828: [JupyterRequire] Model already contains an attribute 'stop'. Skip binding.

But the main issue is that the state does not change:

This is the code from the original talk:

from state do not change in a FSM in python using transitions library