Font can be seen here: https://youtu.be/GnGPAYvve1A?t=17
and here: https://youtu.be/GnGPAYvve1A?t=88
as well as other places in the same video.

The closest I can get with online font identifiers and my own sleuthing skills is something like Roboto, Amiko, Corbel or, (the closest I can find so far, but still definitely not it) Dyno Sans.

I suspect it is a custom/modified font, but I'd like to be absolutely certain that this is the case, instead of giving up without finding a conclusive answer.

Thank you for reading this.

YouTube Sans  Suggested by kylelgr 

It's a custom proprietary typeface.