Your analysis is quite incorrect - From the video shown it shows that the IED's were laid to the side of the road and the bankment of the road dug out to lay the explosives under.
The tactic used by the Turkish Soldiers was correct and they used the bank to take cover from a more immediate threat, the immeidate high elevation of the hill closest to them. They were exposed to the rear to where the terrorists were sat, but the distance between the soldiers and terrorists is not known and from looking at the zooming in and out of the camera I would say they are way over a kilometre. This would mean that the terrorists can only put down harrassing fire at best. Any larger calibre weapon would requre these guys to expose themslves and no doubt, spotters within the Turkish Military would have dealt with that as per protocol.
Improvements though have to be made in a sound and realistic manner, i.e. why were there no jammers on board the vehicles. When the APC gets blown up, the blast can be seen pushing from the side of the road, however just before that, the sound can be heard from the cameraman pressing a mobile phone button. The sound is such that it shows that the terorists had alredy made the call to the IED device, and only required a certain number to the pushed and held for it to activate. This is sloppish at best and jammers should have cut off that call immediately even without them knowing. A secondary activation by way of a countdown is very very sophisticated and only done by a Military, there chances of that are minimal and even then the APC would have long passed it by then.
The chopper, again the distance is not known and using the camera zoom is not a reliable source. The capabilities of whether heat sensors are used on these choppers or exactly what the given orders were to these choppers is not known, as far as the pilot is concerned he could have been given instruction to target a facility not shown on camera and the piolot is making that RV point at best possible speed. The ins and outs are just not know to make an analysis.
The Turkish Military should make some investments in devices which would suit the environment, i.e. Jammers, Boomerang Mobile Shooter Detection System, a Thor system, along with APC or light vehicle carried gatleys.......these weapons would send the terrorists to hell much more quickly then spending hundreds of millions of dollars on a single unit alternative.