reynoldm
Thanks for the update.
Project Preset
NTSC-AVCHD-QFHD 16x9 29.97.
Video Track 2 - 4K video with Videmerge applied
Video Track 1 - 1080p video being used as background to show through transparency created in Video Track 2 video with Videomerge.
Export - 4k UltraHD > MP4 - XAVC-S > LOW
Was your video on Video 2, a clearly defined object on a green background.
ATR