Poor contrast on Xbox One.
It appears that when you have the xbox one selected to Full RGB colors pace (pc levels), and set your tv to match, VLC displays video levels, so blacks are grey and whites are dim.
Furthermore, when you set the xbox one to video level 16-235, and set your tv to match, vlc somehow still has grey blacks and dim whites.
A workaround is to set the xbox one to full rgb, but set your tv to video levels. This will allow vlc to look correct, but of course crushes blacks and whites in all other content.
This problem is relatively new, I'm not sure if an xbox one update or vlc update broke the levels, but it happened recently.
I'm on launch xbox one.
Edited by Daryl Hicks