using the histogram function to turn on the light

Wow. I used the histogram function to lighten up a dark video. It really did wonders. I simply changed the Value parameter as in the graphic below:


Here are the results. Before applying histogram:

After applying histogram:


Test videos:
Before
(3Mb)
After
(4Mb)

Reference
Here are two articles on histograms and their purpose. The second taught me a great deal:
http://en.wikipedia.org/wiki/Image_histogram
http://www.illustratedphotography.com/photography-tips/basic/contrast