Making an embedded video full width and height

Morning people,

I can’t seem to make my background embedded video stay at 100vh. When the browser is scaled down the video scales down in proportion. I have an enclosing div set at 100% width, 100VH with an html embed inside that with the following code:

<video  width='100%' height="100%" autoplay loop muted playsinline poster="">
  <source src="https://res.cloudinary.com/theresthisplace/video/upload/v1594654756/Header_Video_uncompressed_hhwbgj.mp4" type="video/mp4">
</video>

Website page to see: https://alistairs-first-project-e51933.webflow.io/full-screen-video

Anyone know what I am doing wrong?

Ali

Bumping this - can anyone help?