In that vídeo all i see is several games running very slow. Even metal slug 6 which is low demanding is not fullspeed. I don't see great performance in the vídeo to be honest.
Metal Slug 6 and Samurai Shodown 6 runs fullspeed on PCSX2 1.5.0
Yeah, but I was referring to the video using demul emulating the arcade. Demul is slow. Some atomiswave games have PS2 version though, though inferior to the arcade.