My first 4k upload test on YouTube.
Shot with the Panasonic GH4
Metabones Speedbooster with Sigma 18-35 1.8 (wide)
Panasonic 35-100 2.8 (tight)
I encoded it at 50 MBPS 3840 X 2160 29.97
Make sure to select 4k in the quality settings
Jenna J Ross and Chad White 4k - Panasonic GH4 - YouTube