What version of iPhoto do you have?
see this article - http://support.apple.com/kb/HT5251
You may want to set your camera to shoot something other than AVCHD
PS you need to update yoru profile - it sill lists 10.7.5
Thanks Larry, I have iPhoto 11, I will try altering the camera setting as you suggest, but unfortunately that does not solve my problem of accessing my current videos!
The link to the other article was v helpful, thanks. While the article was a bit confusing for me, alongside that discussion were links to other help topics - this contained a link to instructions to deal with my exact issue. Unfortunately it just stated what I had expected to happen - that iPhoto would automatically import AVCHD videos along with photos, unless asked not to do so!
I will sort out my profile, thanks for letting me know.
Best wishes Amer