raytrace reflection tv-screen

So i have a project that uses a tv-screen with content playing on it. This content is reflecting on the floor and works fine in realtime. When i want to export this with the new “high quality media exporter” in UE4 and render it out with raytraced reflections on. The video that is playing on the screen continuing playing while the frames are getting calculated. The result is that the video on the tv screen gets blurred out because its not playing frame by frame while its calculating the current frame of the sequence… im not sure if this explains my problem but is there a way so the tv content is playing frame by frame while calculating the current frame and then when the next frame is calculated the next frame of the video content on the screens comes in?