Problems with my Casting

I am happy that my main character, Ellie Markie and also one of my other two characters, Kayla Harris can be part of the production and is comfortable and happy to be featuring in my music video. They are both excited and thrilled to play a part in my music video which benefites me as it would be easier to film them as they would be determined and happy to get the filming done. However when I contacted my other actress, Laura Glansfield, she said that she was not sure if she wanted to be in a music video and that she did not feel comfortable of the idea of being filmed and being featured in a video. This means that I would need to re-cast and think of the ideal person who can play that part  in my video. She would also need to feel comfortable with the production and also the idea of being in my music video.