HD vs 4K Video Shootout - Upscaled Version

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Is there a big difference between HD and 4K on YouTube?
After my experiment proving that 1080p upscaled to 4K looks better than regular HD on YouTube and that no one noticed I wanted to see it side by side.
BMPC 4K
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Please checkout my other videos as well:
IMO it only shows when I punch in on the HD but thats already been upscaled by 100% so thats to be expected. Other than the cropping, leveling horizons, stabilization, reframing and so on there isn't any huge advantage of 4K for YouToube TODAY, who know about tomorrow.
Music: Josh Woodward "Talk About Your Feelings"
www.joshwoodward.com
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