How to make a quicktime video click-to-play

https://faculty.washington.edu/ghorwitz/research/mechanisms-of-chromatic-detection/

There is a video on my page that makes a very annoying sound (so don’t be alarmed if you open the link above) and I want to make it click-to-play instead of have it automatically play as it is now. It’s playing via quicktime. Any tips?

Thanks