You can install pure virtual camera device to your Windows. Virtual camera AVSHWS has been published on MSDN. This binary is digitally signed.
Get AVSHWS source code from here. If you want to recompile it, you will need Microsoft Windows DDK. These sources are slightly modified. A new video format ARGB is added. And NX (non executable) pool is used for data in Windows 8 and above.
AVSWHWS driver manual and installation instructions.
The resulting video looks this way
It provides 3 video modes: