Yeah its the PRP, as well as some other mods (Advent Children Avatars, 9999 Breaking etc)
Actually, it might just be the NPCRP V0.6 (I realise they're the same thing, but I find PRP extremely buggy and prefer to replace the models myself)
Something strange though... in the video posted above, the characters all seem to move a lot better than they do in my game. I see no difference between my world map and that world map, and my battle and that battle... but on the field in towns etc... the characters seem to "flow" better when moving. Strange.