i have the samsung rant and it wont let me delete old picture and videos that are just taking up room, it says "erase not available" whats up with that?
I'm not sure why your camera is doing this, but i'm pretty sure i know how to fix it.
take the memory card out, and put it into your computer. Take all the pictures off and than get a new memory card. That way, your pictures and videos are safe, and you have more spacee on your camera.
Or, you could put the videos on your computer and use the same old memory card and wipe out your hard drive so all of your videos/pictures are gone. If it still says you can't delete, i'd go with option one.