Make a Rise Button stack required

Is it possible to make a button interaction in Rise required? One of our compliance courses contains a link to a third party video that users must click to get credit for completing the course. 

I built a button stack block in Rise, and when users click on the first button, it takes them to the required video. Then I inserted a "Continue" button at the end of the lesson and set it up to require users to complete all blocks above. But the Continue button activates even if the buttons haven't been clicked.  

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