I'm with PotPlayer.
I did use KMPlayer on XP, PotPlayer seems to be its somewhat refined x64 successor.
Very versatile, never has a problem playing a video, useful shortcuts that I frequently use:
spacebar - pause, restart
↑, ↓ - volume up, down
←,
→ - back, forward 5 secs
Ctrl + ←,
→ - back, forward 40 secs
f, d - frame forwards, backwards (screenshots)
z,x,c - speed up, slow down, default speed
, . / (comma, period, slash) - subtitle sync forwards and backwards, reset
1,2,3,4 - different screen size
return - full screen
esc - minimize
Ctrl + F6 - change aspect ratio
I use it portable: preferences > general > store settings to .ini file
Turn auto-updates off: preferences > general > auto updates > do not use. As Jaspion states:
But you can't auto-update it or it turns Korean
And of course it doesn't have that horrendous silly traffic cone icon
My current skin (with 'Random Color' so everytime opens with a new color scheme):
I'm amazed that JetAudio is good for video:
I have used about all of the popular video players and none have the quality of JetAudio.
You can play videos with poor quality with JetAudio and they look excellent, it can remove blur, choppy or shacking, can take video with small resolutions and enlarge them to full screen without distorting them.
I use it on Android as my music player, after it was recommended on a music forum for its excellent playback quality and musical special effects,
I'll have to give it a try