I just looked at the video listing for these creators and there's nothing but pop-science.
I don't understand how it's at all comperable to KA?
Nobody is using Vsauce to help them study a college course. The videos simply don’t exist, and I say this as someone who’s watched the channels you mentioned.
There’s more to physics than what one person or organization can teach.
I love Numberphile, but they work best as an exposure to new concepts. I'm not watching Numberphile to help me with my statistics homework, I'm watching to be introduced to the concept itself in a relatively entertaining way. It's closer to recreational math than a learning aid.
On the other end, I find KA videos to be a bit dry, but are useful when I need help with a specific concept in statistics or calculus or something.