I tried that. It really doesn't, especially when there's congestion. I've had to go down to 240p on Youtube before, especially if I was trying to do something else in the background, e.g. watch Youtube while doing homework, watch Youtube while browsing Reddit/news/any other website with giant JS/CSS/media files/ads.

I was primarily a student then, and trying to skip around in Youtube/online video lectures was an insanely frustrating experience.