How to add an Instagram bbcode to your phpBB forum and allow picture and video embeds:
BBcode usage:
[instagram]{SIMPLETEXT1}://instagram.com/p/{IDENTIFIER}/[/instagram]
HTML replacement:
<iframe src="//instagram.com/p/{IDENTIFIER}/embed/" width="612" height="710" frameborder="0" scrolling="no" allowtransparency="true"></iframe>
Here’s the result: