In case you are totally blind rather than legally blind, and cannot see the source image showing up every 4th soundscape in the video: That white line could be your white cane, and the white rectangle could be a bright window. Want to try it for real with your iPhone or Android smartphone? Then head for The vOICe web app
$1 and let it use the camera for sounding the live view of your environment. However, be prepared for an overwhelming and annoying cacophony unless you look at very simple shapes or textures, such as your white cane on a dark background, or the keyboard of your PC, or... Best used with stereo headphones, and at a low audio volume. Have fun!