When the video is uploaded preview the page. Right click on the video and "inspect".
In the inspector, find the div that contains the attribute of data-video-urls (this div should be marked from the beginning if you right clicked straight on the video. It will look something like this:
Copy the urls that are in the data-video-urls attribute (everything in between the " "). This is actually 2 urls - one that's mp4 and one thats webm. These 2 links needs to be pasted into the case studies CMS under respective field :)
I hope you find it easy enough to follow these instructions - good luck!