How to get rid of the line under my embedded video?

https://preview.webflow.com/preview/portfolio-98df0a-45d8fa73fe56242899f4e0?utm_medium=preview_link&utm_source=designer&utm_content=portfolio-98df0a-45d8fa73fe56242899f4e0&preview=30c346a02260227273ec373f033a677f&mode=preview

If you open up on mobile you can see that there’s a ton of white space on top and bottom of the video.