Photo management with video support
Solution 1:
This is included in Shotwell .8, which you can get here.
Solution 2:
Take a look at gwenview , it just may be what you are looking for.
Solution 3:
DigiKam, unfortunately is a KDE app. It will handle videos but its not intended for that purpose. Also you should notice that it might be a bit to much for photo management, but i haven't found an app that can handle photos and videos in an efficient way.
Personally I have given up for now, and I'm using different apps for photos and videos. It's also worth noting that Shotwell is going to have video support, eventually.