I beleived that all videofiles contained metadata just like those sony-videocameras I have been using (DV and HDV). However when I got some AVCHD-files from a friend I discovered that they did not contain metadata. They were filmed with a Lumix still-camera. I asked Panasonic why no metadata were available and have now received an answer that neither still- nor video-cameras produce metadata. Hopefully Sony still produces metadata in their new HD-videocameras.
Why are metadata excluded from the files?