This post was originally published at ask.audio
The trick is first knowing how video is added to FL Studio projects. You first need to add a Video Player instance to your Channel Rack. You can do this by clicking the plus sign to bring up the components you can add, and then choose FL Video Player.
This will add an instance of the video player. This is just a blank movie player. So next you have to add a movie into this player that you want to use in your project.
Author : Gary Hiebner