[BUG] Sort - Capture Time doesn't work, movies?

Question

I found a strange bug: when set on Capture Time order, all my Nikon D300 photos are correctly sorted, however some movies I took with an old Canon bridge camera are placed in the wrong spot.
As you can see from the date and hours, they are presented before where they should be.

Answer 1

This is a symptom of a more general issue: LR 3's handling of video metadata is incomplete and inconsistent with the way it handles photo metadata.
With photos, LR reads and writes metadata either from the photo directly or a sidecar.  Even if the photo is missing all metadata, you can still edit it in LR and write it back to the photo (or its sidecar).  In particular, you can edit Metadata > Edit Capture Time and then write it back to the photo.
But with videos, although LR reads metadata from .thm sidecars, it never writes it back to the sidecars -- the Metadata > Save Metadata To File fails silently.  You can edit all the metadata (e.g. caption, rating, keywords) in the catalog except Capture Time.
If you import a photo that's missing the metadata field DateTimeOriginal (aka Capture Time), LR uses the file's creation date as the date that appears above the thumbnail, and the thumbnail will sort properly by Capture Time with respect to other thumbnails. (Note that the date above the thumbnail and Capture Time are two different catalog fields -- a photo can have a thumbnail date but no Capture Time.)
Similarly, if you import a video that's missing DateTimeOriginal, LR uses the video file's creation date as the date above the thumbnail.  But unlike with photos, it does not sort properly by Capture Time with respect to other thumbnails (and LR won't let you invoke Metadata > Edit Capture Time to fix the problem).   This is the particular symptom you've observed.
As an aside, it would be better if LR used a file's Date Modified rather than Date Created as the default "thumbnail time" and capture time.  Windows preserves Date Modified if you copy a file, whereas Date Created gets changed to the current time.   So if your camera doesn't produce video sidecars, and you copy the video file in Windows before importing it, LR won't get the correct date the video was taken.
A workaround to this problem is to create manually a .thm sidecar file for your video with the right DateTimeOriginal before importing it.  Create a .jpg file with the same base name as your video and use LR or another tool to set its DateTimeOriginal metadata field. Then change the file's extension to .thm.  Finally, import the video file into LR, and it will pick up the DateTimeOriginal from the .thm.
This mess with video metadata is a good reason to keep using the third-party plugin in LR 3 to manage video files.