Ignorance and callousness are not virtues
Well, without rehashing the rest of this post, it could also be the desktop dimmer. Right-click in the player's screen select preferences, and look for any eye-candy settings (esp. the dimmer), and turn them off.
I am told you can also circumvent the problem by simply moving the video to another workspace. The box apparently stays where it is...
A bleeding heart is a symbol of holiness, a symbol of compassion, not an epithet
When our discourse sinks to the level of meaningless, pejorative labels and personal name-calling rather than honest reflection and reasoned dialogue, we are no longer a people, but a mob