>>321842510
If you mean communally then >>321842942
Otherwise there are like 1001 ways including >>321843104

I've heard bigscreen is pretty good for that kinda thing, especially if you just want to invite a couple friends. If you're alone then there are basically infinite programs for that, just pick one that isn't horribly rated and has an environment you like, hell WMR has little theater nooks in most of their default environments, and the built in W10 video player supports mkv and softsub, to say nothing of just spawning a desktop viewer and slapping it on the wall. Can also do this in SteamVR Home (not sure about Oculus Home)