Does she secretly wanna sabotage me?

I have been friends with this girl for almost a year. We got off really well. Shes nice and all. I treasure her friendship. Recently, we went on a road trip. I dozed off cos I was tired and sleepy. Towards the end of the journey, she showed me a video she took of me sleeping with my head bobbing about mouth opened. I laughed at it but I must admit that I felt a bit embarassed. Dont get me wrong. Im a good sport and make fun of myself sometimes. Today she showed me a photo she took of me getting up from a chair and it wasnt the most flattering photo of me. Again I laughed at it. She told me she wants to keep it for old times sake. I dont want to be paranoid but why is she doing this. Its shes constantly looking for my bad points and recording it.I hope Im not overreacting. But im still a bit hurt that she is doing this. Why not other people?