2160p anime lags due to subs

[Host-in-the-Shell]

I'm going to go out on a limb and say that the 8 year old laptop CPU may have some issues transcoding 2160p videos. Not saying it's 100% scientific, but since the official documentation lists certain Intel hardware from 2016 (which is 6 years old) as "Entry level", I don't think it's a crazy logic leap to make.