There is an important distinction between using a person’s ideas and reproducing a substantial part of their copyright work. You can develop choreography using the same underlying theme as another work (for example, the seven deadly sins), and may be able to use a particular move you have seen in someone else’s work, without infringing copyright. However, if you perform someone else’s copyright work without permission, you are unlikely to avoid infringing copyright simply by making a few changes to it.

Note that making alterations to another person’s choreography could also be an infringement of the choreographer’s moral right, if you fail to attribute them for what you have taken from their work.