When launching a game that is set to play in fullscreen, the game does not enter fullscreen mode until after the intro movies play.
This was also mentioned on UDN: https://udn.unrealengine.com/questions/232840/media-framework-umg-movie-not-playing-general-movi.html
How does TextureRenderTarget2D get TArray<uint8> type data?
How to delete some elements correctly when deleting an array loop?
Why does the REMOVE method of map container remove elements have memory leaks?
How do I set a material as a post-processing material?
What is the difference between Camera and CineCamera?
How would I go about lerping the rotation instead of it snapping when turning (pls dont sue me epic)
How does TArray loop correctly remove elements in blueprints?
Head over to the existing Questions & Answers thread and let us know what's up.