And yes, for disabling flash gpu accel, the person would need to open youtube, or some sort that can play flash, right click on the vid screen, settings and disable gpu accel.
this tweak should increase perf in some way?
By disabling it, if you're mining on a machine where you watch youtube videos, GPU performance should not be interrupted. But if it is enabled, and you watch youtube videos, flash will use gpu accel=meaning flash will use graphics devices. But if you don't mine, it's good to have enabled for better flash performance.