Viewing Videos in a Facebook Post from my Iphone

For posts on Facebook that have a mix of photos and videos, I can only view the photos and none of the videos. For example, when I go to view it from my iphone, I can see the first 5 in the main screen (4 pics and 1 video). When I click in any of those 5 to see the rest, in this case +13, it only shows me the photos and none of the videos. This is a new issue. It goes for not just posts I've created but for any post that has a mix of pictures and videos that goes beyond the amount I can initially see. This is only an issue on my iphone as I'm able to see everything fine from my laptop.