I apologize up front if this answer exists. I'm sure it does, but cannot seem to find it.
I have a course built in Storyline 2, consisting of mp4 videos with some pop ups above the the videos on the screen as well as layered on top of the video.
When I view it on my iPhone (from my LMS, LearnUpon), I only see the video but not the popup texts or objects. (Secondarily, I also notice the video seems to detach from the course and display on its own without the course appearing around it. Maybe that's an option I inadvertently selected.)
I wonder why this is happening. I'm using Safari in my iPhone.