eevBLAB #16 - 4K Render Youtube Experiment

Dave is running a test upscaling his 1080p 50fps footage to 4K UHD (3840x2160) 30fps and uploading to Youtube. Rumour has it that Youtube is supposed to detect this 4K footage and give better quality converted video quality.
Can you see any difference between this video at 1080p and this other one uploaded at 1080p?
https://www.youtube.com/watch?v=q95mfnmMdwA

And if there is a quality difference, is it worth the extra file size, rendering, transcoding, upload, and youtube processing time?

Render times for the 5min video are:
4K = 17:29
1080p = 1:59

Transcoding (Handbrake) times:
4K = 6:53
1080p = 1:09

Filesizes:
4K = 1281M
1080p = 312M

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