Probably "The Beauty of Bézier Curves" [1], one of the choices by 3B1B, comes closest. It is already a relatively large channel although usually focused on game dev tutorials rather than math explanations. This video bridges those two areas and is absolutely beautiful.
Interesting--I recognized that animation style immediately, because she's also the creator of a Unity asset library called Shapes[1], (a "...real-time vector graphics library with high-quality line drawing and infinite resolution shapes, rendered with advanced anti-aliasing techniques"),
which seems to have been used to create the video.
[1] https://youtu.be/aVwxzDHniEw