Sharing and Preview links are stable and stay the same from draft to completed video. Here are a few differences between the two video links.
The Sharing link is used for sharing with other members of your team who collaborate with you on video creation and have a Waymark account.
This is branded with Waymark and will allow Waymark users to Save a Copy of the video in their own Waymark account.
The Preview link can be used for showcasing a video to an external client or partner.
This is not branded with Waymark but does not have a Save a Copy button compared to the Sharing link.