Alternative player when uninstall WMP

It's now possible to uninstall WMP in Win10. Unfortunately there's no video-preview in DO then.

Is there an alternative plugin for DO? I use MPC BE.

MPC BE can't be used inside other programs, as far as I know. Most movie players can't.

Why uninstall WMP if you want to use it?

I dont want to use WMP, but of course preview in DO sometimes with a better player (means: better usable GUI/control-icons).

And I dont want to have x players installed.

BTW videos are still played (which player, classic?), but not mkv.