When I tried to watch the intro video, there was a pop-up msg that informed me the video was not supported. I'm not sure if it was because of format or because I need to download some type of software or app.
First, can you please confirm exactly which version and variant of which Magix product you are using? You've chosen Movie Edit Pro as your product; I'm running the latest version of MEP Premium (19.0.2.58) and the "Intro" video plays without problem.
It would also be helpful to we fellow-users if you would read this pinned post and give us full details about your computer etc.