Panasonic GH4 4K vs Blackmagic Cinema Camera Green Screen / Chroma Key Comparision

Two similarly priced cameras, the 4K Panasonic GH4 with a standard compressed output and the Blackmagic Cinema Camera with a uncompressed output but which one will be the best for green screen / chroma key work. Normally when working with chroma key or green/blue screen you would look to use an very high quality output like cinemaDNG RAW or ProRes 4:2:2 but can a 4K camera like the Panasonic GH4 with a compressed output work as well. In this video I do a quick