.MXF is a file format / Container. What codec did you render to?
YouTube supports converting XAVC, XDCAM, cineform, Prores, and Avid DNx series. Most of the brand name codecs are just custom variants of MP4, MPEG2, DV, MJPEG, and JPEG2000 codecs.
Did you shoot under cheap LED lights? CRI matters, or you may need to put some minus green on your lights.
Did you compensate for Computer RGB vs sRGB conversions that happens when you playback in “players” like Windows Media? If you already have a green cast going in your master footage, the contrast shift that happens in the sRGB to cRGB can saturate the green tones more. MP4 operates under sRGB levels. All your levels should be corrected for sRGB, so they expand correctly to the cRGB space in players like Youtube, small devices, and windows media player.
Have you tried playback in VLC player?