How to change the splash into an animation?

how to change the splash screen with .gif or .webm files

That isn’t an option I’m afraid.

You can override the Splash screen with an image in the Player settings directly, or have your custom artwork built in to the Player using the project’s white labelling service (which is at a cost).

Okay. thanks for the reply. I think i’ll stick with an image, that works as well for me. C: