I’m sorry, I’m not going to watch a 34-minute video about a different coding platform (related yes, but different) to figure out what you’re needing help with.
This is helpful:
Have you tried to set up the blocks required to do this? If so, please post a screenshot of just those blocks and I can see if I can help you fix them. Also, your screenshots are very small. Perhaps you can post larger ones?
I hope you don’t mind me asking but… as a doctor, why are you choosing to program hangman? Are you aware of the recent Weekend Design Challenge?