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Embedded vimeo wont fill whole screen - help

looking to view my embedded vimeo video as a background video, full screen on a desktop and then also have it retain its height when responsive

tried several tutorials with no joy. I feel like this should be super simple… what am i missing!

https://preview.webflow.com/preview/fiftyfive5?utm_medium=preview_link&utm_source=designer&utm_content=fiftyfive5&preview=d3225c797f0e000f61b25c3ae9452062&mode=preview