The new Xiaomi Mijia Mini - 4K and Touch screen for under a £100!

A good video editor will let you open a 1080p file, then export it as 4K. It will have to make up the missing pixels, just like resizing a photo.

any decent free ones? I would only use it very little.
 
Off course you dont get any detail up scaling to 4k, but i still think it look okay and it do make it more easy for the YT servers to process without ruining it too much.
 
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