Yes, I was aware of that, but Google is greedy and their new YouTube layout works smoothly only with a Chromium based browser. Here is a rough explanation of why that is: [Click To Open Twitter]
So really, using it on roytam1's browser is not a very good option regardless.
Please keep in mind that I do not have experience with the newer and more resource heavy layout on older hardware as I have been using XP on a modern computer and performance has never been a problem for me, so it might not be as noticeable on older computers as it is on newer and more powerful ones.
More smoothly than any other non-chromium browser with a spoofed user agent, yes. Also, neither the last official Chrome (49) that works on XP or the Advanced Chromium (54) support the new layout, even with a spoofed user agent. (The layout does not load properly and does not work, at least to my knowledge)
Layout, to be more precise. Please excuse me for the confusion that I may have caused due to English not being my primary language.
Right on point.