Removal of the Black Screen at the start of the Articulate Storyline Module

I've had a similar issue just recently, I have just one slide in my course and there are two layers with videos in each. I tried all the suggestions above but none worked to get rid of the big play button at the start so I rebuilt it from scratch to see where the problem started from and it seems that it all works fine (without any big play button) until I add the closed captions to the videos, either by uploading them or by typing them in manually. Once the captions are added I get the play button again. Is there a way around this? I really need to add the captions but also don't want to have that big play button. Putting a blank slide doesn't work for this - the only way I can get rid of the play button is to remove the captions!