I have yet to experience brake fluid contamination of my engine oil....
I suspect from the video there, the most likely reason for this is someone stuffing the brake fluid in the wrong hole.
Seriously, though, of you let your oil get so low that braking puts the light on, you are already in trouble. The Ai narrator managed to avoid mentioning the significance of 'braking' while basically telling the viewer to stuff more oil in, stop putting brake fluid where it doesn't go, and maybe go see someone who knows how engines work to sort the problem.
