And the much longer video by the same person:

Problem with PEMDAS: Why Calculators Disagree https://youtu.be/4x-BcYCiKCk

If you’re using it on steam just increase the dead zone a little bit.

I remember hearing stories about oil companies buying up battery patents. But this may be because they want to collect the royalties, not necessarily to suppress any kind of research. But like you said, I don’t think there is any evidence… But if they were suppressing the technology, we probably would never know about it.