I have been looking at it frame by frame I cannot come to a decision but I am certain that what ever it is it isnt a J-10 and the cockpit and the wing placement is not really close to a flanker!
Analyzing the Vertical stabilizer, high wing position and front fuselage symmetry is making me lean towards the JH-7 BUT! the 4th covered aircraft to me appears to have two Vstabs.
There is a very high possibility that these videos will be scrutinized by the IAF intelligence it might very well be a calculated move on behalf of the PAF.