Hey, not seen you post for a while, Laura.
That's a good song for you. You have the right sort of voice. I enjoyed it.
I would just say ...
1. Maybe do it again when you have the whole song confidently in your head. Then you can look at the camera, and engage with people who watch you clip.
2. You look a bit hesitant. Be more confident. You have a really nice voice. Possibly nicer than you realise. Enjoy your voice. Be confident with it. It will give your whole performance a lift if you look like you're enjoying singing. It's not just about how you sing. It's about how you present your singing.
3. I'd say DON'T go on the X Factor. The X Factor is for talentless wannabes who will do anything to be famous, and who can be made to sound good if you give them vocal lessons, engineer their recording so you can't hear their real voice, and distract the audience from how rubbish they are with costumes and dance routines. If you can sing well, you don't belong on the X Factor.