[4.15.2] Resizing while a media is open crash game

Hi Andrew !

No need to migrate, i reproduced the crash on a clean blueprintonly 4.15.2 project,

here it is :

here the dx diag :

steps:

Open crashVideoTest.uproject

Load MainMenu.umap

Play (in current viewport or PIE )

Resize viewport ( don’t be scared to try hard, play with size without releasing mouse, sometime it take some retries )