This is a Nodegroup addon that allows you to convert between Filmic and Standard colour-spaces in the compositor… allowing you to render your 3D scene in Filmic and comp it onto a video without the whites in the video being greyed out.
It also allows you to bring an image or video into your 3D scene … and filter it so it’s not greyed out by the filmic colour space. This could be very useful if used alongside my other addon Greenscreen Within Eevee Pro.