Those are just page after page of embedded YouTube videos. It's doubtful that's a meaningful difference under this bill.

What are you talking about? You can click on any of the lessons and get text and images. https://www.3blue1brown.com/lessons/essence-of-calculus

Which aren't videos. The entire draw is the video format.

That seems awfully particular.

Grant Sanderson's mathematical animations and visualizations are famously excellent, though. He developed his own mathematics animation software just for his channel. I wouldn't think of video as preferable to textbooks for math education in general, but for his sort of videos, I might!

The bill only bans them from having accounts.

It does not ban them from streaming embedded YouTube videos or even browsing YouTube.com

"The bill only bans them from having accounts."

No, the bill says they must take reasonable steps to prevent underage persons from accessing their services. Arguably, this means embedded videos will need to be restricted just as the regular site will be.

That is not the only channel of value on YouTube. Not all of them have a website with their content available.

Can you spell out the standard plainly?

The standard of what?

The channels besides 3blue1brown that would reach parity.