Have I got a treat for you!
In case you can't tell, I consider Alfred Hitchcock to be the king of suspense. For that reason, whenever I get a chance to watch one of his movies or learn from him, I take it. Well, this last week, I came upon several video clips of interviews with him on YouTube. Here are three links:
On the difference between mystery and suspense.
Part 1 of a longer interview with him in 1964 (7 minutes).
I hope you find them as helpful as I have.