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I remember a similar technique (maybe it's from the same people) where they amplified color changes.

So the tiny flushes caused by the heartbeat were clearly visible

https://www.youtube.com/watch?v=ONZcjs1Pjmk (from 1m30s)

Yup, Durand and Freeman worked on both. The Eulerian video magnification isn't just limited to color changes, of course, as the video shows. This new technique is still based on Eulerian magnification, if I understand correctly.

And the Person can see itself in a "mirror" that shows the magnified movements, thus making drastic adjustments and shortly losing all control.

similar to this? https://www.youtube.com/watch?v=lQAXtTpm930 (based on the technique raverbashing linked)