Was able to run all unsupported versions of the MPC-BE video player, including the latest, 1.6.3. But there are a few peculiarities. Because VMR 7/9 was removed, you have to install a third-party video renderer, like madvr. Or use Enhanced Video Renderer, even though it says it's not installed, it works. The DXVA hardware acceleration does not work for the same reason. But on my test computer with Core 2 Duo E7300 processor any 1080p video opens without frame dropped, even with AV1 codec. Also the built-in subtitle renderer doesn't work, so if you need subtitles, install XySubFilter or xy-VSFilter.