We already know they took the open-source code, re-implemented it and closed-sourced it into a product and that is permitted under the MIT license:
>> So you vibe ported manim to rust, kept it closed source, and you’re selling access to it with a monthly subscription? This isn’t satire?
This isn't the same as what you would get from something like Markdown [0], which explicitly says:
"Neither the name “Markdown” nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission."
What he must do is to attribute credit of the library to the original author (3Blue1Brown) for the derived use. But other than that, this is permitted.
I'm talking about the submission title, which makes the claim that Manim (3Blue1Brown's animation engine) is running in the browser via WebGPU.
The product at the link is not 3Blue1Brown's animation engine. It is not Manim. They created something different and used Manim's API as a guide.
The submission title claimed it was Manim and 3Blue1Brown's engine. It is not.