Instagram announced a new feature on 22 February 2017, where users will be able to upload multiple photos or videos to produce a "slideshow" item in their Instagram feeds. More information in this article by Refinery29, and also here from Instagram.
The feature looks like this (sourced from the Refinery29 article):
Sked Social supports these posts with both images and videos in carousels.
To create a carousel post, choose 'carousel' when you are uploading from the upload posts page.
You will then be able to upload up to 10 images or videos (that's Instagram's maximum number) for your carousel, and you will see in upcoming posts that the post is a carousel post.
You can click 'edit carousel' to adjust the order of your content, delete one or more 'slides' or add new ones.
Currently, you can't upload new carousel posts through the planner, but we hope to add this in the future. You can of course edit carousels through the planner!