Hi Ingrid, I just replied to your email, but I thought I'd post my response here in case anyone else has the same question.
If you're placing an InDesign document within another InDesign document, then even if the placed INDD file includes animation, it will be rendered as an image.
Instead, use in5 to export the infographic as a separate document and use the in5 Web Content interactive widget to embed the infographic. Go to in5 > Interactive Widgets > Web Content and in the Web Content dialog, click on the button with the 3 dots and navigate to the index.html file of the exported infographic on your hard drive. Here's more information about using the in5 Web Content interactive widget: