This is a screen shot of the unfiltered Media Screen used in the samples below. Note that the Video Filter Edit Tool will expose different controls based on the filter type being edited.
Unfiltered Sample Screen [1]
Video Filter Edit Tool - Parameters Vary by Filter Type
ARGB Red/Green/Blue + Transparency
Description
Red/Green/Blue: Set Red/Green/Blue color levels independently from 1 (100% of actual video color) to 0 (0%, no inclusion of the color).
Alpha (Transparency) - Set the video transparency in the range from full transparency (showing a Media Screen background video or image) up to full Opacity (with a Media Screen background image totally hidden).
Description: Lighten up a dark video and/or add contrast. You set the Brightness and Contrast levels. The Contrast Base setting sets the darkest Contrast shade limit that should be applied.