.swf video not playing

Hoping someone can help me out with this since I am not very video-savvy.

I'm working on a project in Storyline that is essentially just a series of embedded .swf videos and a quiz. All of my imported videos are playing except one (attached), and I'm not sure why. All videos are .swf format and came from the same source, so theoretically they should all be the same.

When I import this video, all that appears is a black fade in and that's it for the entire video, and it shows no time length. It's the same whether I preview or publish. I've opened the video with different programs and it plays correctly, so I'm wondering if there's a setting that's strange or if it was originally published differently, or if there's an issue with my Storyline project?

I wasn't the one who originally created these videos and I'm not sure who did, so I'm hoping there's a way to fix it on my end instead of having to go back to square one.

Thanks so much and have a good one!