Whether the 3×3 binning on 5D Mark III cause resolution loss？

[gelaxstudio]

My question is the title~
    For my opinion，the  3×3 binning is much like a digital low pass Filter .By binning pixel ，it cloud reduce Moire，but like the low pass Filter ，it will cause resolution loss in return.
    When I saw the ISO test video shooted  by 5DM3,it showed resolution loss ,but I ddi't think it's caused by NR or out of focus.After all,the video was came from Canon Japan,which mean it is highly credible.
    What's more ,as it's cuased by binning pixel,the high bit rate mode like ALL-I won't be able to make up the lost resolution,and sad to find out this function can't be disable if user wanted.

    I am not a expert in this aspect,so I can't sure my opinion is absolutely correct.
    Let's discuss and find the answer . :)