Bonjour Tom,
Based on this first experience, and Gil who has two of them could also share his opinion, I would say that, as this little engine is not water cooled, its behaviour changes a little bit when the heat is increasing (after 3 or 4 minutes).
The needle valve is VERY sensitive and I was told that if the engine stops after a while, the mixture is too rich, this is why, when it stopped by itself as shown during the video, I closed just a little bit the needle valve and its stsrted again easily.
Furthermore, the gasoline tank is small, I had not filled it to the top so I emptied it quite quickly after the end of the video and the engine was not too hot.
I have also learnt by myself that if an engine does not want to start with my hand, it is always the winner, the cord supplied with does not help, until you find, degree after degree the appopriate setting. And on course, not obvious to go on the good side... The drill tends to drown the spark plug.