How do you play HD-movies?

i'm using MPC HC with klite codec updated, it's the best for my opinion

Another vote for VLC 🙂

MPC HC with klite mega codec and MADVR

Try MPV. Quite possibly the most customizable option with low overhead. It's open source, keyboard friendly, and the UI gets out of your way. VLC's playback UI is so big and annoying and it pulls you out of watching movies.

Currently VLC, in the near future will try MPV.

Plex - to living room tv from downloaded library.

VLC all the way

VLC, a classic

Mpv +1

Plex when I'm not at home and Kodi v18.5 running on CoreElec 9.2.1 on my Hardkernel Odroid N-2 when I'm at home.