My brother and I experienced the same thing. He beat Necron(?), saw the part when Zidane wants to find Kuja and talk to him. After that, the airship takes off and the FMV shows a lot of distortion then freezes. I find it kinda stange how 1.5.2 works better than 1.6.0 w/FFIX. But yeah, it kinda pissed my brother and I off, though.