Can confirm: still broken in the 5.6 launcher build, and Epic’s 5.7 fix (commit b3d5488, CL 42996416) works on 5.6 as well:
https://github.com/EpicGames/UnrealEngine/commit/b3d54880f6456c971acced9fb342b3548f6d97b0
For anyone who can’t open that link: in BinkMediaTextureResource.cpp, change ERHIAccess::UAVGraphics to ERHIAccess::SRVGraphics in both functionsFBinkMediaTextureResource::InitRHI and FBinkMediaTextureResource::Clear().
No source build needed: copy Engine/Plugins/Media/BinkMedia (Source folder + .uplugin) into your project’s Plugins folder, make the change there, and rebuild.
Would Epic consider merging this into a 5.6 hotfix? It hard-crashes any DX12 project that uses a Bink Media Texture.