While the following images are video stills, the same retouching principles that work on photos work with videos. Video is somewhat more limited in what can be done as one is working with a series of moving images. My color treatment always has a purpose: to enhance the mood of the image, to better represent what the image felt like at the time it occurred so the viewer feels more than what the raw footage offers.
Before: a little dark and low contrast overall.
After: giving some warmth and light to the girl's face adds to the emotion of the scene. I also minimized the background contrast so that it would not compete with the main focus.
Before
After: creating some light, when done skillfully, can completely change the feel of the image.
Before
After: an edgy look to match the client's hip branding (green is their main color).
