How to make video clips for a horror game?

Well to add videos to unity you need to have the pro version. An alternative to that is making a video, and rendering the video as a series of images... then in unity, make a script that will quickly switch between those images, giving the illusion of a 'video'... after all, that's what a video is, images moving fast.

Then just fill up the entire screen with that video... there. Flashbacks..

Hi, you can use LightMV to make a video clips for a horror. This will help you a lot.