My booster videos do not work since a few weeks.

Hi @Mariettevanwerk, the studio is aware of this but I don't know their priority list and where this falls on the list.  Yesterday the video opened up but then froze on my phone so I had to close out the game and clear out the history.  It happened to me twice.  I just opened the game and it's not even there so maybe they took it off the game for a fix.