I see. So you mean for the VMS solutions, not the stand alone IP cams (such as Nest, Ring, Wyze, doorbells, etc)?
Want to store it in some proprietary cloud? That's fine, but it should only be done as an afterthought. SFTP, CIFS, and WebDAV would enable any power user to build and use their own home storage or cloud storage.
Otherwise, you are not materially different from Ring or Google.