Please help! I can't get my media plane out of focus...

Hi there,
So I just put an alpha video of a person on a plane in my enviroment. Everything seems to work just fine. But when I try to focus the cinecamera on something in the foreground, the video stays in focus no matter what. Even when I put it far in the background. (The rest of the scene goes out of focus just fine)
Am I overlooking a setting somewhere? I cant seem to find anything about this issue online as well…

I’ve set up the video through a Media Bundle to get the Media Texture. And made my own translucent material with that texture to get a nice key. Then I’ve put that material on the plane in the level.

I’m not an Unreal Expert, so any help is much appreciated. Thanks!