Text fade in Matinee facing camera

I come from a 3D Artist / Rendering background. And working on a 3D Model presentation in UE4. Got everything working so far. Great lightmaps + realtime lighting and a cut scene camera Matinee setup. Now all I want to do is adding a slogan text at the end of the cut scene. Why is it so hard to do that. I am searching a lot but can’t find an easy answer. I have a 3D Text in my scene. With a default texture material to it. Now I would like to fade the opacity from that material in the Matinee. I can’t find the right way to do it. And another thing I would like to do is keep my 3d text constant on the same place / facing camera on screen no matter if the camera is moving.

This should not be to hard right? Can you point me in the right direction? Is there an example maybe…