Random YouTube videos almost cause system halt with lag in Chromium on Debian 9.8 i686. Drivers and web browser seem up to date.
Most YouTube videos, for example this video plays with no issues whatsoever, nice and smooth, with at most 720p resolution.
I can't see any rhyme or reason to these issues, and they make YouTube close to un-usable.
The hardware could be considered underpowered, but a lot of HD video plays fine.
I have tried other browsers, Iceweasel plays them but plays all videos slowly, Midori, Xombrero, and Minitube don’t play at all.