Whay format does your camera shoot?
Froma quick look at the Panasonic site it shoots both AVCHD and MP4.
A note on AVCHD: This format was developed for people who are shooting to edit the material afterwards. If you're shooting to edit, then iMovie or Final Cut are the correct home for this material. If you're not shooting to edit consider using one of the other video formats on your Camera.
While some forms of AVCHD are supported by iPhoto not all are.