A 1906 film of San Francisco was "upscaled" to 4K and the result is stunning | California Sun:
Now Denis Shiryaev, a YouTuber known for restoring vintage videos, someone has boosted the resolution of “A Trip Down Market Street” to 4K using image-editing techniques that essentially fill in missing details to heighten the realism of grainy films. The result, embedded below, is remarkable. (For full effect, make sure the playback quality is set to 4K under the gear icon at the bottom right.)
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