From video description:

“MIT researchers invented an augmented reality headset that gives humans X-ray vision. The invention, dubbed X-AR, combines wireless sensing with computer vision to enable users to see hidden items. X-AR can help users find missing items and guide them toward these items for retrieval. This new technology has many applications in retail, warehousing, manufacturing, smart homes, and more.”

https://www.media.mit.edu/projects/augmented-reality-with-x-ray-vision/overview/
https://www.youtube.com/watch?v=bdUN21ft7G0