Youtube
On Youtube, when you get the black screen,
Right click
Go to Settings
And turn off Hardware Acceleration
Try Youtube again it should be working.
Thanks for the NoSleep hint!
My DVD player hasn't worked since an unfortunate incident about a year ago. I opted to not replace it when I got my MacBook repaired after a drop because I never use it anyway. Sorry that's not very helpful.
Also, I thought I had Flash working but now I don't. No youtube, haven't tried VLC yet. Any idea what I might have missed?
On Youtube, when you get the black screen,
Right click
Go to Settings
And turn off Hardware Acceleration
Try Youtube again it should be working.