@ProRock thanks for liking it! Adding new services is pretty easy. I recommend making of fork on github and looking in my watchmovie.py to see where I do getProviders(). I have to use postman to look at the full response so I can match provider ids to their names, and then I add small pngs per service. Feel free to add a pull request!
I'll look into making a back button, alfred flows are kind of strange because they only want you to go forward but I'll see if I can be creative.