Lightbox midway through slide - not picking back up

Hi,  I am creating a short awareness course and I'm using the lightbox function for the first time. I am using layer for a particular module. In some of the layers the lightbox is midway through the slide. When the video plays it doesn't pick back up in the next piece of content. I've attached a few slides and if anyone could recommend a trigger please. I've tried a few out but no joy. 

Appreciate any help or steer anyone can give me. 

Regards

Niamh