Media Texture Resolution size for VR display

Hi.

I’m using a VR Pawn and a Sphere with a Media Texture to display a 360º video, my intention is to be able to execute a .exe from my computer and display the video both in my screen and the VR Headset.

Previously I used a 4k (4000*2000px) video of 2.5GB and it worked just fine.

Now I’ve encountered a problem as I’m using a new file that is over 4k (4896 * 2448 px) and 5.4 GB. Now the media texture is constantly buffering and stuttering. I tried compilling the .exe and it still happens, not just in the viewport.

The file is pre-cached, in the project folder and using Android Media. I’ve checked in 2 different computer with good VRAM and there’s no difference so I’m guessing it’s a software limitation.

Am I missing something? Is the file just TOO big? Is there a limit for media texture resolution?

Thx in advance.