Also switched the D3D11 and D3D12 renderers to use real NV12 textures for NV12 data. The combination of these two changes allows us to implement 0-copy video decode and playback for D3D11 in testffmpeg without any access to the renderer internals.
FIXME: We need a way to do this that doesn't involve reaching into the D3D11 texture internals
Default to no sprites over the video