Same for me, but I can see a possible issue with very young users. Re-teaching people who are out of school but never really grasped some math concepts is "easy" compared to providing the whole math curriculum to kids.
For me personally it has been a really great resource. I think the fact that there's no pressure when you're watching them compared to the classroom where you're supposed to understand things very linearly - makes it the best possible resource for learning math for me. I love being able to pause and go Google/Wikipedia around or re-watch the video from the beginning when I get lost. Overall I think it's a great resource, you basically get a private teacher any time you want. If someone doesn't see value in that, I guess they never had trouble in school.
For me personally it has been a really great resource. I think the fact that there's no pressure when you're watching them compared to the classroom where you're supposed to understand things very linearly - makes it the best possible resource for learning math for me. I love being able to pause and go Google/Wikipedia around or re-watch the video from the beginning when I get lost. Overall I think it's a great resource, you basically get a private teacher any time you want. If someone doesn't see value in that, I guess they never had trouble in school.