Begin this lecture with a challenge: How many film genres are there? Professor Williams spends this lecture introducing you to the definitive list of genres based on what happens in the film and how the movie makes you feel, not an arbitrary and generalized category. Diving deeply into the meanings and examples of movie genres can help you better define what you look for and love. As for the actual number of film genres Professor Williams has established? You'll have to watch the lecture to find out the answer.