Action Details
Requirements and how-to articles for Instagram's action:

Requirements
You need this to get it done:

iOS, Android or Windows Mobile Device
In order to upload photos/videos onto Instagram, you need to do so using a mobile device via the official Instagram app.
Photo(s)
You can upload up to 10 photos in a single post. The orientation you choose (square/portrait/landscape) is applied to every photo in the post (you cannot select different orientations for each one.)
Caption (optional)
A caption can be added to your post (maximum of 2,200 characters.) Hashtags can be added by adding a word prefaced by a "#" which allows people to discover your post. (For example, a post with "#fashion" in its caption will show up for everyone browsing the "fashion" tag.) (maximum of 30 hashtags per post)
Video(s)
You can upload up to 10 videos in a single post. The orientation you choose (square/portrait/landscape) is applied to every video in the post (you cannot select different orientations for each one.)
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How-To Articles
A list of useful links for you:

0
Instagram Help Centre - Posting and Adding Locations
Official information on posting photos and videos on Instagram.
Official
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