I don't think anyone cares to develope WII MC any further, especially for wii u, the system is capable of more power for video playback than a backport wii homebrew using less of it and no dvd playback. (Not to offend any of the homebrew makers) But if there was gonna be a homebrew player for wii u, it would not be on vwii or would probably only be self hosting a server on your LAN where you can connect to using web browser. (I tried that once, was fun for awhile)
There isn't many but mostly emulators that use wii u pro controller like genesis plus gx latest update, Not64 and those nintendo eumlators.
https://gbatemp.net/threads/snes9xgx-mod-preview-wiiupro-screenshot-button.389448/