Turn Videos Into Minimized Sticky Videos Upon Scroll

https://youtu.be/wSnomhkFysU

Example Java/HTML Code:
#HTML

1   <style>
2    .test
3    {
4    position: fixed !important;
5    top: 0 !important;
6    left: 0 !important;;
7    right: 0 !important;;
8     z-index:999 !important;
9     width:300px !important;
10     height:200px !important;
11    }
12   </style>
13   <script>
14   window.onscroll = function() {myFunction()};
15   function myFunction() {
16    if (document.body.scrollTop > 90 || document.documentElement.scrollTop > 90) {
17     document.getElementById("video-PUTHERETHECSSVIDEOSELECTORCODE").className = "test";
18    } else {
19     document.getElementById("video-PUTHERETHECSSVIDEOSELECTORCODE").className = "";
20    }
21   }
22   </script>

Example CSS:
#HTML

1   #video-PUTHERETHECSSVIDEOSELECTORCODE {
2    float: left;
3   }