Tony DeRose is Pixar's Senior Scientist, and he uses math to make movies. In this TED-Ed talk, he explains to kids how basic math functions within animation. It may be pretty simple, but have a look:
To get more into DeRose's work, here's a 15-minute talk. It includes the basic math bits, but also gets into the projects he does with his kids.
And here's a 45-minute talk by DeRose, with much sketchier audio and video. It digs into the math bits in much more detail, though the recording isn't great.