Fortnite OG - FIXED! Out of Video Memory Error...
Fortnite OG update in November 2023 has an error saying "Out of video memory trying to allocate a rendering resource. Make sure your video card has the minimum required memory, try lowering the resolution and/or closing other applications that are running. Exiting...".
This video shows the simple fix in Windows 11. You have to tell the launcher to downgrade from DirectX 12 to DirectX 11 using the "-dx11" flag at the Fortnite command line.