Thonny is a great beginner IDE for coding in Python. Enchant is a module (aka library) that allows checking of valid English language words, which can then be used in a variety of word games.
If you try to use the Enchant module in the Thonny environment, it seems to 'not work'. The 'fix' is to use the system Python install (3.4+) with pyenchant installed- there are many resources about that deal with both the install and installing modules using utils like the pip installer, so that is not included here.
Follow the steps in the video to have Thonny use the system Python and allow you to use enchant in your Python program.