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Despite my comments about the sky not always being red, I think there is a simpler explanation.

This video was made by a "content" company on a monetized YouTube channel. The screenshot is simply a colorized version of a black and white image

Note that the notes below the video do not provide the source of the images. You can't check the source of their data, they offer it only in the form they want you to see.

from the "Front Obstacle Avoidance Cam B" shown later between about 00:39 and 00:43 in the video.

enter image description here

In both the sky and the ground, the three colors track each other. There is color pixel noise generated when converted from some online image to a MPEG and then back to JPEG and then PNG, but basically they converted the gray scale to "bluish" in the sky and "redish" on the ground via photoshop or similar.

quick pixel analysis

import numpy as np
import matplotlib.pyplot as plt

img = plt.imread('pEGAp.png')[..., :3]


r, g, b = img.reshape(-1, 3).T
fig, (ax1, ax2, ax3) = plt.subplots(3, 1)
ax1.scatter(r[::100], g[::100], s=1, c='black')
ax2.scatter(r[::100], b[::100], s=1, c='black')
ax3.scatter(g[::100], b[::100], s=1, c='black')

Don't trust random monetized channels!

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