Boarbarktree.
My maths YouTube channel. Currently inactive, but it may well come back.
The channel
Hand-drawn explainer videos on algebraic topology, including a three-part series, You Could Have Invented Homology. Each video was an enormous amount of hand animation in Adobe Animate.
Where it's at
It went quiet when I started my PhD, because I couldn't keep up that pace alongside it. I still want to make the videos, which is why I'm building Whiteboard: a way to make them without animating everything by hand.