If you are customizing your widgets through the custom CSS or Javascript areas you will need to make sure you adhere to the display guidelines. Instagram and Twitter are two guidelines you must review before styling your Widget.
Their display guidelines differ slightly but both state that you cannot alter or modify any content displayed from their networks.
Note, if you alter or modify the content you run the risk of being contacted by the respective sites and being asked to update your posts as per the following guidelines.
To review the Instagram guidelines please click on the following link - https://en.instagram-brand.com/
To review the Twitter guidelines please click on the following link - https://dev.twitter.com/terms/display-requirements
If you do wish to alter the post information then you will need to get the Rights from the content creator to do this. Find info on Rights Management here.
For any further questions or queries, please send an email to support@nosto.com and our support team will get back to you.