regarding the DVD Store: I'm not sure but I think there isn't any repository for this anymore. But it has been replaced by the PetClinic. You can find it here: https://github.com/inspectit-labs/spring-petclinic-microservices
In the repository's readme you also find a detailed description how you can start it with inspectIT.
But keep in mind that the original inspectIT is no longer developed further!