Why are my ingame videos playing at 2-3 the fps when I render a cutscene to video ?

Movie playback in Matinee and Sequencer is not supported yet. There is no time synchronization between the movie player and the cut scene renderer right now.

I’ve made animated video signs attached to skyscrapers, they are using a video as their source, and when I fly around my skyscrapers they play just fine, but when I do a cinematic and render it to a video they play 2-3 times the speed compared to what they do ingame, anyone know why that is happening ?