why would the Enterprise have a well worn Ms 21 if she just got repaired a couple months before?
Some caution about determining colors from this film. The film is faded from age.
The ships above destroyers size (there were A lot of them and I won't list them) "scheduled" to be at NYC for the 27 October 1945 "Victory" Navy Day Presidential Review were;
USS MISSOURI (BB-63)
USS NEW YORK (BB-34)
USS ENTERPRISE (CV-6)
USS MONTEREY (CVL-26)
USS CROATAN (CVE-25)
USS AUGUSTA (CA-31)
USS COLUMBIS (CA-74)
USS HELENA (CA-75)
USS MACON (CA-132)
USS BOISE (CL-47)
The above list was published BEFORE the event and some changes occurred. Like USS MIDWAY being there. Since this was a major event, ships would have been as ship shape as they could be. USS MIDWAY and the three BALTIMORE class cruisers were brand-new ships that never made it to a war zone before the war was over and likely were painted with the neutral grays.
In the video the order of ships seen at some point before the review, are; of course USS ENTERPRISE looks to still be in a well worn Ms 21 with 5-N, USS MIDWAY was assigned to be painted in the new Ms 21 with neutral gray #7 Navy Gray (not #17 Ocean Gray) ... http://www.researcheratlarge.com/Ships/S19-7/1945_S19_631Application.html
... , USS AUGUSTA, USS BOISE fresh from an overhaul also likely in #7 Navy Gray (see image below), and finally one of the three brand new BALTIMORE class cruisers. If the image that Andrew posted has accurately named the cruisers then this last cruiser seen is probably USS COLUMBUS.
As an aside, USS FDR (CVB-42) was commissioned at NYNY on 27 October 1945. She was painted in the new Ms 12 of #7 Navy Gray to the lower hull up to the main deck and #17 Ocean Gray to the structures above. See image below.