I haven't used my 2 XS in quite a while. It is so drastically under-powered for the current versions of Roku firmware and apps that it isn't usable (to me) any longer. When I did last use it, YouTube was the one app that had the worst performance. I do recall that it crashed on occasion, but only if I had been trying to FF or rewind. Of my current players using the YT app, the Stick and TV have a little lag when FF or rewinding, but the 4 and Ultra work flawlessly.
Personally, I think it's time to retire the 2 XS and any other boxes that are that old. One of the problems with Roku branding is that there are a number of players called Roku 2 or 3 that have very different capabilities. I really wish they hadn't reused the same model names with different actual models.
Nvidia Shield, Roku Stick (3600), Ultra (4640), Premiere (3920), Insignia 720p Roku TV, Sharp 4K Roku TV, Windows 10 Pro x64 running Serviio and Plex on a wired Gigabit network.