Could that be the issue? All the files are mp4 files, but maybe it was the way I exported the video in Premiere that's causing this (I selected the output as YouTube 1080p). I have a few other videos in my training, but the difference with this one is that I created the video on my Mac using Adobe Premiere Pro and the other videos were recorded and edited in Replay. If you just want to do a simple video fade. I've tried removing and adding it again and the same issue keeps happening. Adobe Premiere is a great video editing program but many people who use it don't need all the bells and whistles. I then tried the tip in this thread of triming the video within Storyline, but then my presentation froze for the same length of time at the frame where I froze it. I thought it was an issue with the video so I imported it into Replay to quickly cut the extra time out of it, but that extra time wasn't in my original video.

Basically, this video ends with a fade to black and then stays on that black screen for about 45 seconds (the link is just to Articulate Review with this slide).

I'm having a similar issue with a video that I imported into Storyline.

Download add fade to black premiere pro