https://www.youtube.com/watch?v=rB83DpBJQsE&feature=youtu.be...

Here's a little bit of quote from the video:

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So... typically this is the part where there might be some kind of sponsor message. But one thing I want to do with the channel moving ahead is to stop doing sponsored content, and instead make things just about the direct relationship with the audience.

I mean that not only in the sense of the funding model, with direct support through Patreon, but also in the sense that I think these videos can better accomplish their goal if each one feels like it's just about you and me sharing in a love of math, with no other motive, especially in the cases where viewers are students.

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He's really a good person. I'm glad that now he is able to do this full-time by just the support from his patreon.