Everyone can agree on VLC being the best video player, right? Game developers can agree on it too, since it is a great utility for playing multimedia in games, and/or have a video player included. However, disaster struck; Unity has now banned VLC from the Unity Store, seemingly due to it being under the LGPL license which is a "Violation of section 5.10.4 of the Provider agreement." This is a contridiction however. According to Martin Finkel in the linked article, "Unity itself, both the Editor and the runtime (which means your shipped game) is already using LGPL dependencies! Unity is built on libraries such as Lame, libiconv, libwebsockets and websockify.js (at least)." Unity is swiftly coming to it's demise.
Edit: link to Videolan Blog Post: https://mfkl.github.io/2024/01/10/unity-double-oss-standards.html
Have you checked the manual? The amount of options is staggering, bordering on esoteric. The only catch is most of them need to be setup either through CLI or .ini files.
I can't say anything for the frontends, but you can use plugins for basically anything in mpv itself, including the issues you've listed. Again, you need to setup the whole thing and read the manual, but it's there. And yes, I see the irony in all the effort needed to do basic stuff like this when something like VLC just works™, but to me that's the beauty of mpv, it's basic and minimalistic yet you can make it work however you like given time and patience.
Btw you can check the file info by pressing
ion the keyboard while playing something.