MadVR is described as 'Uses your GPU to perform resolution upscaling, chroma upscaling, and all kinds of other video rendering enhancements that can significantly improve video quality. It can be used with a few different video players such as MPC-HC and PotPlayer' and is an app. There are 2 alternatives to MadVR for Windows, Linux and Mac. The best MadVR alternative is Anime4K, which is both free and Open Source.
Anime4K is a set of open-source, high-quality real-time anime upscaling/denoising algorithms that can be implemented in any programming language.
Anime4K is the most popular Windows & Linux alternative to MadVR.
Anime4K is the most popular Open Source & free alternative to MadVR.
Anime4KCPP provides an optimized algorithm version 0.9, and it also provides its own CNN algorithm, it provides a variety of way to use, including preprocessing and real-time playback, it aims to be a high performance tools to process both image and video.
Anime4KCPP is the most popular Mac alternative to MadVR.
Japan
I dont't think this is a video render/filter for windows..