Nouri falls at the start of the video, he's still seen breathing. After 40 seconds first medic reaches him, the rest of them at 1:12. They seem to start looking for some specific medical equipment at 1:52 (still without CPR), then we get 7'30 minutes cut out. There's an ambulance and they're still on the pitch. No sight of anyone doing CPR, though I know there is mechanical utensil that can replace human with it, however I've got no idea how popular it is around the world (they're in Austria, 10km from Wiener Neustadt).
Why do you say it's useless? Just last week in my country there was an elder tourist on a mountain that suffered cardiac arrest, few people helped him out also performing CPR for 30 minutes until medical helicopter came. The man was saved and he's fine thanks to those who did the CPR, otherwise he'd be dead.
From a medical point of view there are a good number of other things to consider - hindsight is always 20/20, and the team may be criticised for not jumping on the chest immediately.
Firstly, you can't start CPR until they've had full cardiopulmonary arrest. He was still breathing away, yes he looked shattered, but in a young, fit footballer who's previously well you'd rarely think 'Must be a heart attack'. He could be hypoglycaemic, that needs to be checked, he may just have low blood pressure, that needs to be checked, is he asthmatic? All sorts of other vitals need to be assessed before launching into chest compressions.
Assumptions can't be made about the quality of care he received on the pitch just from the video, I'm sure he received appropriate medical attention based on the situation present. The fact that he is still with us, in itself, is borderline miraculous. Out of hospital arrests carry a terrible prognosis, even with prompt medical attention. Cardiac arrests in general carry awful outcomes, even in hospital. With regards his neurological state, it's not surprising that this is the case, while CPR helps, it's often not enough to sufficiently oxygenate the brain sadly.
It's a tragedy what happened, and the case of Fabrice Muamba may be brought up - he was truly miraculous. I hope he regains some function, but I'd be guarded on his prognosis certainly. Poor guy.
For me, it raises the question of medicals for clubs. Do these include echocardiograms to assess the structure of the heart? I'm aware that Italian children are screened prior to starting PE in school as the mediterranean ethnicity is prone to 'Hypertrophic Cardiomyopathy' (just enlarging of the heart, in particular the septum between the ventricles) where essentially during strenuous activity, blood flow out of the heart is restricted to the point it can't oxygenate itself - boom, cardiac arrest. Does anyone know if they get ECHOs prior to starting for a club? I know it wouldn't pick up all cases, but it's a cheap and easy test to do.