I make maths-related video explainers and essays for my YouTube channel. I started doing this for the yearly Summer of Math Exposition, and then continued more regularly after one video suddenly gained a huge number of views for no apparent reason.
My videos are made using a whole bunch of methods shoddily composited together, including animations, digital handwriting, physical handwriting and props. Most of my animated text is made with Manim, a community-maintained version of a program originally created by Grant Sanderson for videos on the 3Blue1Brown channel. I sometimes also use Blender for 3D animations.