Frank on which course did you test?
I see it might be due to cached Please let me know the course where you tested so I can check.
The ideal way to test it out is go to the course play the video for a few minutes then you can stop othe r leave browser and then come the back on same course again.
It will be added to wishlist same way as its displayed already on the dashboard.
I just tested for this https://dev.uxinnercircle.com/courses/getting-journey-mapping-personas-right I played the video from 6:02 and played it for couple of minutes.
I went to the dashboard and came back and the video was on 8:08 second 