Hi Amanda, The new proofing viewer for interactive content is not ready yet. The upgrade applies to static proofs like PDFs, images and video files. We are aiming to support interactive content within the new viewer for 2018.2 release with all capabilities available today within flash tool. The ability to combine zip files as a one proof is planned for further releases (tentatively 2018.3)
Note: This particular viewer will be launched as a small desktop application that will run on your local computer. We specifically chose this approach to solve a number of the limitations (iframe restrictions, insecure sites, and other constraints) that are present with the interactive content Flash viewer today.
Andrzej Muca Product Manager Workfront
