UE4.22 - Media player drops video FPS, why?

Hi, i want to add videos every time player reach a boss location, but… every time a precache video starts, depending on how heavy the level is, for example if a level plays lower tan 24fps, then video plays lower too, so every video in my porject plays very slow… unless i play that video in a default level without anything, what can i do to fix this drop of FPS in videos?

Please help!