OK, I looked at the Northport Virtual Tour scenario. The first scene has a video with an On Done action that linked to the second scene. It functioned as expected, and it functioned the same as the published link you provided above. I then changed the link to another scene, published, ran as expected, changed it back, published, also ran as expected.
As long as you publish each time, the new content is there. Are you using a viewer account to view the published content that perhaps isn’t assigned the version of the scenario that you are publishing? I’ve made that error myself a few times when working with several copies of a scenario and one of them not assigned correctly.