From NASS:

I colorized, restored and created a sound design for this video of Detroit, late 1930s , we can clearly see what is happening in broad daylight, Scene Street

Video Restoration Process:
✔ FPS boosted to 60 frames per second
✔ Image resolution boosted up to HD
✔ Improved video sharpness and brightness
✔ Colorized only for the ambiance (not historically accurate)
✔added sound only for the ambiance
✔restoration:(stabilisation,denoise,cleand,deblur)

Please, be aware that colorization colors are not real and fake, colorization was made only for the ambiance and do not represent real historical data.

B&W Video Source from: Prelinger Archives.

[NASS]