Sony Handycam transfering videos

I have an Sony Handycam. I lost my docking station so my friend tried to download my videos for me to her computer. The videos are not showing up but the files seems to be there. There is an X through each one of them. Also, now when I try to look at them on my camera there is an X through the file and I can’t watch them. Have I lost the videos? If not how do I get them to play?

Exactly what did you friend do to get them from your camera?