I got the videos with alpha working. But seems that it wont be a solution either. There is a hiccup whenever playing a media file, which makes frame perfect transitions between video clips to another impossible. In my case it means, that when the “TITLE APPEARS”-animation finishes and “TITLE LOOPS”-animation starts, there is a nasty pause that kills the smootheness and makes the whole scene messy and clunky. I guess I have to forfeit the idea of using large sized 2D effects together with 3D, and just make a 3D skeletalmesh of the Title and animate it in Maya. Its not the stylistic choice I wanted, but at least it will look professional and doesnt require Gtx 1080ti.