That's the first time I've heard that. Curious what about it makes it harder for you. That's a shame, but it seems like 3b1b doesn't cater to your learning style!
After thinking about it a bit, I believe it may be 2 different things.
1) When I learn something, I like daydreaming about it and coming up with a mental model of how it is in my own head. So, having someone else's vision and animations used can screw up my own mental model and make it harder for me to forge connections between concepts.
2) I enjoy rigorous math more. I find it hard to make logical leaps and assume properties about things unless they were previously established as facts. This is why I like analysis a lot, althought I'm not great at it. I think 3B1B is more informal when explaining things, and the lack of rigour confuses me over time. Especially in a longer video.
1) When I learn something, I like daydreaming about it and coming up with a mental model of how it is in my own head. So, having someone else's vision and animations used can screw up my own mental model and make it harder for me to forge connections between concepts.
2) I enjoy rigorous math more. I find it hard to make logical leaps and assume properties about things unless they were previously established as facts. This is why I like analysis a lot, althought I'm not great at it. I think 3B1B is more informal when explaining things, and the lack of rigour confuses me over time. Especially in a longer video.