Video created as Storyline output has blank start screen when used in Rise multimedia block

Thanks for sharing your .story file, Errol! I'm seeing the same thing when I publish your project to video, and it seems like it's happening during the publishing from Storyline. My own example file is showing the poster frame as expected, however. I'm going to get a case started for you so we can have a closer look. You'll get an email from us with next steps soon!