Black Stretch: Increase the black level of the video.
White Stretch: Increase the white level (or brightness) of the video.
Red / Green / Blue: Independently adjust the rgb channels of the video.
Alpha: Independently adjust the transparency of the video.
Saturation: Drag this bar to the right to increase colour saturation or drag it to the left to convert colours into black and white (greyscale).
Premultiplied Alpha: Tick this box if the source is using premultiplied alpha which is often the case with MOV and other video formats containing an alpha channel.