A todo esto, la fuente de "Quantum Fracture" se parece más a Proxima Nova o a Avenir.

I know, but since that is the name of a Youtube Channel and was in shadows, while the center of the image were mathematical equations, I understood that the question was about those.

I understand that he's asking for the mathematical font.

Another alternative

I see that in Nexa Rust the rust (for instante, on the "N") is in different places.

Yeah. It's Nexa Rust. I was going to correct it.

It's Latin Modern, the standard font used in LaTeX word processor (the usual one for scientific works). Latin Modern is an evolution of Computer Modern, designed by Donald K. Knuth.

Inspecting the web page https://www.virginmobile.ca/en/plans/postpaid.html#!/BYOP you can see that is VMUltramagneticNormalRegular

Custom font for British Gas. See https://louisesloper.carbonmade.com/projects/5873591

Well, it's the most famous font in the world, so I assume that somebody knows which font is it.

There are even documentaries about it: https://www.youtube.com/watch?v=wkoX0pEwSCw

Looks like a DIN font. There are many variants. https://support-valorant.riotgames.com/hc/article_attachments/360074820714/Change_language.jpg