We are not familiar with HikVision NVRs. However, our service is compatible with HikVision IP cameras. It seems your cameras are regular IP cameras (that can work with NVRs or upload to the cloud directly). Please read the setup guide:
Our service may also work with your NVR, if it supports FTP / SMTP based uploading. Please check your NVRs configuration screens. If you have any questions, please email us the screenshots.