Well that won't do anymore as MPV.NET is already at v5.4.1, released 2019-09-05 (check https://github.com/stax76/mpv.net/releases), while development is still going briskly.
The official site offers native portable packages for download, which I have have yet to test thoroughly but, because they're DotNET based (you'll need the latest v4.7 framework, in fact), I'd expect MPV.NET to leave behind some minor traces.
mpv.net is a modern media player for Windows that works just like mpv. [...] mpv.net is based on libmpv which offers a straightforward C API that was designed from the ground up to make mpv usable as a library and facilitate easy integration into other applications. mpv is like vlc not based on DirectShow or Media Foundation.
If a folder named portable_config next to the mpvnet.exe exists, all config will be loaded from this folder only.
Now, configuration of the underlying mpv (https://mpv.io/) engine seems to be an advanced science field by itself and that's something MPV.NET explicitly aims to make easier -- I'd still recommend an extensive read of the homepage manual or similar resources, though.
There's also a fairly recent 3rd-party review from Ghacks.net at www.ghacks.net /2019/07/05/a-look-at-mpv-net-a-mpv-frontend-with-everything-integration/.
MPV.NET latest release can be downloaded from https://github.com/stax76/mpv.net/releases.
[*] I'm deliberately using the name in all-caps here in order to offset keyword ambiguity, as a search at TPFC or Google for "mpv.net" will get scores of totally unrelated results.