The rapid pace of computer animation improvements.

https://youtu.be/ihYsJpibNRU

An ingenious deconstruction and rebuilding of an image as if an artist had drawn individual  brushstrokes, allowing a shift of the light source to a new location. The illustrations show its capability really well. 

I like this fellow's enthusiasm - he always says "what a great time to be alive!" in each video. 

Here's another mesmerizing video of simulating viscous fluids and jellies: 

https://youtu.be/i4KWiq3guRU

And his remorse at missing a paper from 8 years ago that was revolutionarily simple in adding bubbles, foam, and spray to water simulation by searching for acutely angled constrictions in the water-air interface. 

https://youtu.be/O-52enqUSNw

@5:50 "One simple, brilliant idea changes everything" in computing depth maps of video footage without the crutch of having to use human input. 

https://youtu.be/eTYcMB6Yhe8