Here is the example code from a Vimeo Embed that contains the uncovered "Blob URL".
Look for URLs with mp4 and token query included.
Cute Kittens from Teemu ToriTori on Vimeo
Sourced from here: http://webhostwhat.github.io/jekyll/update/2017/08/15/cute-kittens-vimeo-embed.html