TRC off... maybe u pressed a button or something something that switched your traction control off. If so, just press it again when ur done drifting like one guy said...
If VSC always on... dunno, maybe u screwed the Vehicle Stability Control and it needs checking...
Before you get disappointed watching the full video, let me be the first to tell you that there isn't any drifting in this video, it only shows some track footage of...