How To Use Levels in Photoshop
With Levels, an image histogram can be shifted and stretched. It is available in Photoshop and other image editing programs. It allows the user to specify black, white, and mid-tones on a histogram to alter brightness, contrast, and tonal range.
The Photo is this video is by Jordan McQueen and is available at https://unsplash.com/photos/z8BkA7hQa3I