The Rebels are getting pretty good at this. I'm surprised that they're not winning the war considering that there must be at least several dozen tanks and APV being destroyed the HJ8.
battles are only the small scale, this is war. it's strategy and follow through. These reports are highly focused and one sided propaganda, they fail to take into consideration the victories of there adversaries. and the resources being thrown at them.
Anti-tank missiles are not designed to hit fast moving targets they don't have the manoeuvreing capabilitys warhead, motors, weight etc
If the helo is hovering you might get it but if it's flying fast then probably no and this question has been asked many times check back in the thread.