India hasn’t claimed that all Fatah missiles were shot down. India doesn’t have that kind of capability. AD is deployed to protect key installations, both civil and military. And a missile likely to hit them are attempted to be neutralised. It is again not possible to intercept each and very often them.
The Indian spokesperson had accepted that few bases were attacked and minor damage to men and material. No OSINT videos are required to prove this aspect. When a Fatah class of missile makes an impact, it is bound to cause massive blast and fire affect. The same has been captured and distributed as proof of destruction. Missile hitting inside a base and causing meaningful damage are two vastly opposite things. Missile hitting a runway or missing it by few meters is all the difference between being lethal or not.
This is where Fatah failed to make any credible effect.
There could be two main reasons for that -
1. Indian AD was very potent and neutralised most threatening missiles approaching them, thereby reducing damage to key installations.
2. Inaccuracy of Fatah as a system. Is Fatah capable of striking targets with pin point accuracy or is it an area weapon? Was it just fired towards Indian targets with an aim to cause area destruction or engage specific targets.
Both appear to be true in part.
Had some other accurate weapon been used, probably, Indian AD could have been beaten and better results obtained for Paksiatn.