Thank you for your reply!!
But I think I am stupido^^ 
I figured out why the YouTube URL is not working, its because you are using the URL of the web page and not the URL of the video.
I do not find any solution, to get the real path of a youtube video. I think I need somethink like “…video.mp4”? I only have solutions to get the ID of a video 
Here’s my working example of Fuse playing a video URL of a YouTube video in fullscreen (you could always hide the controls with UX):
I have copied your cody 1:1 but I do not get any video displayed
And what is this url? is it from youtube api?
Sorry if I missunderstand and that I am not that great