OneLinePlayer isn't working, but I've seen it work on Webflow before

I am trying to use OneLinePlayer to create GIF-like videos. I’ve seen it on other Webflow sites, but for some reason, it refuses to work on mine. Here’s the code from the website:

<div style="padding-top: 52.56%; position: relative; overflow: hidden;"><iframe frameborder="0" allowfullscreen="" scrolling="no" src="http://onelineplayer.com/player.html?autoplay=true&loop=true&autopause=false&muted=true&url=https%3A%2F%2Fvimeo.com%2F358382453&poster=https%3A%2F%2Fi.vimeocdn.com%2Fvideo%2F811992232.jpg&time=false&progressBar=false&playButton=false&overlay=false&muteButton=false&fullscreenButton=false&style=light&logo=true&quality=720p" style="position: absolute; height: 100%; width: 100%; left: 0px; top: 0px;"></iframe></div>

Look at the Enter Incomes section (other sections are tests of different methods)
https://preview.webflow.com/preview/kaylaportfolio1991991?utm_medium=preview_link&utm_source=designer&utm_content=kaylaportfolio1991991&preview=2b041e3f64f236a1416a330f3a281be6&pageId=5d475aba3a861d192f8b025a&mode=preview