I'm the type to use Fraps to record when I have to, but what makes me refrain from using Fraps is compressing its recordings.
OBS is a pain in the neck with an HD4000 (no dedicated GPU i.e Radeon/GeForce).
Never tried Dxtory and never will, so good luck. (it's Dxtory btw)
Action! firetrucks up and freezes like a statue when saving.
XSplit is a bad option, I heard.
ShadowPlay is for the GeForce GTXes starting from 6xx--still beta, but will do the job in almost every game.
Forget about this wall of text, Dxtory is another story for me so good luck.
On a note, the wall of text up describes my problem (i5 3rd Gen, HD4000, 4GB), is there a way to record osu! 60FPS at these specs?