I think I have found an easy workaround for this problem. To have a media texture synchronised with my matinee during capture, I pause media player immediately after opening source and then I set new position of the video 25 times per second via level BP (media texture input video is 25 fps). As long as the video file wasn’t very large (4k and more), this method completely solved the problem for me, since the video progress was directly related to interp position of my matinee.
