Imported Videos reporting incorrect date in the Content Created column despite EXIF data being correct.

I did a quick test. FCP 10.6.6 displays imported movie dates in this order in its "Content Created" column if one or all of them exist (...I did not test if GPS locations or timezones might intervene like they do in images...):

1. Keys:CreationDate (.mp4, .m4v, .mov)

2. UserData:DateTimeOriginal (.m4v)

3. QuickTime:CreateDate (.m4v)

4. MacOS:FileCreateDate (.mp4, .m4v, .mov)

So using Keys:CreationDate in the import movie is most robust in all those movie date variants (.mp4, .m4v, .mov). The same applies also to other current movie metadata (Author, Title (or DisplayName), Description, Keywords, (UserRating)).

In addition to Keys and UserData, there is also ItemList with similar tags.

...sadly movie metadata is still a moving target...

Jonathan, this might not be the issue you're having, but when I run Sony AVCHD media through EditReady to create standalone .mov files, it causes their modification dates get reset to the current date. I run this bash script to re-assign the modification date to the original creation date. This makes FCP display and sort them correctly.

/usr/local/bin/fmusetmod.sh

#!/bin/bash
for i in *.mov
        do
                created=`/usr/bin/GetFileInfo -d "$i"`;
                /usr/bin/SetFile -m "$created" "$i";
        done

Does this show the date FCP uses:

exiftool -a -G1 -s -fileOrder5 FileName -api QuickTimeUTC=1 -Time:All -api RequestAll=2 -api LargeFileSupport=1 .

You can change the creation date in FCP if you have to.