How do you play HD-movies?

vlc media player

VLC run the best for me .

alshow player is best

i use VLC , Windows media and KMP.

I use Movist (I am on Mac)

I use Movist, which has Perian installed within it.

i use potplayer

i use windows media player and vlc.

mpv media player with libx265 / HEVC

VLC for the win.
But it's not perfect and when it bugs I use MPC too.