You could probably reconstruct the frame using the previous frame and just brightening the snot out of it (assuming there isn't too much movement).
Btw, has anyone tried lowering the overall brightness with levels?
The last integer is the input level. While you can't recover detail lost (like in the frame posted above), you can bring down the range. So to lower it 5 points would be: Levels(0, 1, 255, 0, 250).