My Thoughts:
1. It appears to be fake and I don't think Pakistan would do any sort of audio or videographic recording anymore since it's has been noted by the UN and the Red Cross that they have already violated multiple Geneva Convention Rules/Terms.
2. The build of Wing Commander Abhinandan is not that heavy and the facial hair (and head hair) doesn't appear to be the same as well.
3. the video quality seems to be damn low (kind of feature phone camera quality).