Just tested the extra flags. They had an effect: no more screeching, no constant static. What happened was I saw the first frame of each movie, the blue green bar flashed in the lower screen, immediately followed by the second first frame etc. On the second launch (I loaded up a random save game) my craft failed to reach orbit. On that mission step a green flashing circle was visible for about half a second, accompanied by "we have a no g..." (sound was cut short). After the failure analysis screen, the mission continued at the same lightning speed described above.