Not sure what to make of that video, I mean the guy is breaking the bars in a direction not likely to happen hitting potholes. Would it have snapped off with a similar amount of force applied in a more riding-like direction?

Be that as it may I'd be afraid to use knock-off carbon bars, personally - that is the no-name kind coming directly from China and often seen on eBay. Breaking the bars or stem suddenly could lead to catastrophic injuries, I'm just too scared to risk it.