General problems with creating vull screen video

Dear Support,

for days I`m trying to set up a landingpage with a full screen video. I’d prefer to embed a self hosted video. For building the site I tried both, a colour section and a full screen slider.

My problems:

The self hosted videos (.mp4)

➢ are not shown as full screen/ have borders
➢ are on mute
➢ are not loading

Is there a tutorial you can recommend?

Or might there be something wrong with the video files? Do I have to convert them into another format?

I also tried some Testvideos from Vimeo. They are shown in full screen size, but with them I encouter other problems like: no loop, control panels shown, etc.

I guess it’s all quite easy to fix but I don’t have a clue how. So, I am really looking forward to your help!

Thanks Sandra