Once a video is published it will appear on your dashboard, you can hover over the video thumbnail and Click the ‘edit’ button on any video on your dashboard.
This will take you back to the editing page where you can add and rearrange products. Once you have edited your video, Click publish and your URL link will automatically update when the video is restarted/refreshed. No need to copy the link again.
Any changes to your products in Shopify that you have connected to a shoppable video you made in Imursif, will be displayed when the video is restarted or next played.