Show Next Button After All Slide Objects Clicked, Viewed, and Visited

Hello!  I have a problem that I would really like the advice on. I have the same situation - several objects on the main slide, by clicking on each object it takes me to a new slide with a video and a then quiz slides afterwards. I want learners to be able to click objects in no special order. I want the next button to appear normal, not once I clicked all objects on the main slide, but after learners would have also seen the video and done the quiz. The problem that I find is that the next button becomes normal too soon...and it does not look good. I tried to work with variables here (adding that only after the videos are completed the state should change), but it did not work. Any ideas?