All output MOV files show Rec709 color space, despite attempts to set to sRGB

Hi all, I've been working in Rec709 color space, and just found out I need to deliver my animations as sRGB MOV files. No matter what I've tried, the output files always have Rec709 color space embedded, according to AE when I import then, AND when I view in VLC player and check out Tools > Codec Information.  When I import them, they do appear darker in AE, so at least some gamma shift is happening, but again they're showing that their color space is Rec709. Methods I've tried include:

• obviously setting output color management to be sRGB
• exporting as ProRes 422HQ, Animation, and Avid DNxHD (the only allowable types for the client)
• trying outputting with no color management
• changing the project color space to sRGB before exporting
• attempting to change the color management upon import (it won't let me when project is color managed)

Any ideas on how I can export videos that actually show as being sRGB? Or does it matter? They certainly look darker than the previous Rec709 renders I'd done, but I want to know whether it's a problem that they import as sRGB.

Thanks for any help!