Hey Adam!
You are after the FL Studio ZGameEditor Visualizer.
The ZGameEditor Visualizer allows you to create animated videos off of audio frequencies like you’d see in Adobe Effects (but it’s included free with FL Studio, and pretty powerful!)
My ZGameEditor Visualizer tutorial will teach you some basics.
The FL Studio Fruity Video Player is not for creating animated videos like this.. it’s intended for sync, meaning for creating music based off of video for commercials, tv shows, movies, etc.
The ZGameEditor works by adding layers, it’s a little tricky to figure out at first. Just remember, the layers on the left are on top of the layers on the right if I remember right..