A well-edited collage of film clips whets my appetite for films I might not otherwise be aware of. The one embedded above was created by the same person who did the nice reviews of Kieslowski's Three Coulours trilogy. But... it doesn't have an index of film sources that I could find. That's very disappointing.
By contrast, the Welcome to a Supercut video below supplies a lengthy film list at the YouTube link.
And here are nine minutes of jump scares.