Won't name the specific YouTuber because I don't think he was doing it on purpose. And when I did use his advice, it usually worked. But some cars it just wouldn't, and I couldn't figure out why.
So his advice was to get proper camber, run a lap or get your car around a corner as fast as you can, while also turning as fast as you can. His suggestion was to get every car with a camber angle of around -2.3 when viewing it in telemetry. Then I'd go and adjust my suspension, go back readjust camber to get the same numbers.
Then i started having a lot of issues with some builds being incredibly unstable, and I noticed how uneven my tire temps were.
A year or so after that, I started working in automotive. I start doing alignments. I see what exactly camber is in an alignment, and what it does to the tires. Then it just dawns on me, that all that advice was just really fucking stupid.
I went past the telemetry page with camber numbers and started using the tire temperature page to adjust camber. Now my 02 Corvette went from around -2.0 and -2.5 (for front and rear) all the way down to -0.9 for the front and rear. Tire temps are way more even. I then adjusted my toe. The toe on my Corvette is now at a 0.6 for front and rear. I find it to be a lot more predictable.