the video is here:
1- Good is “bon”:
In a dictionary, you will find that good is “bon”
2- Too Good to be true:
It’s good can be c’est bon or c’est bien
La leçon est bonne means the lesson is correct or good
la leçon est bien means you like it and it is good!
Expressions with bien:
3- The Rule:
Not only one, usually about quality, taste, efficiency we use “bon”, when you like something or about health, it is “bien”
It is a good movie: c’est un bon film (about quality)
This movie is really good: ce film est vraiment bien (you like it)
4- Too Bad
Good also means “beau” in French
So, when you are not sure, use your dictionary!