it's avisynth (script based) application, well known for video enthousiasts to enhance a video (noise, colors, deinterlace etc..)
As far as i can see on the picture it uses ColorYUV(analyze=true), filter collecting luma/chroma stats values and Histogram("classic") to display the luma range (brown zones being critical for Rec601 videos, 0-16 / 235-255)
The red/green mode is to easily spot non valid luma or chroma... i think yes, don't know which filter it is though, i've seen it before
more info on histogram:
http://avisynth.nl/index.php/Histogram
More infos on avisynth:
https://forum.doom9.org/forumdisplay.php?f=33
Basically your script would look like this if you want to experiment
Code:
AVISource("MyVideos")
ColorYUV(analyze=true)
Histogram("classic")