Systems and methods are described for enhancing a social media post with a content item. An illustrative method includes receiving a social media post; extracting, from the social media post, a first content item; identifying, in a frame of the first content item, a portion of the frame that is a non-focus portion; identifying a plurality of content items that fit within the non-focus portion; identifying a content preference of an audience of the social media post; determining an estimated length of time that the audience will view the social media post; selecting a second content item, from the plurality of content items, that matches the content preference of the audience and has a duration that does not exceed the estimated length of time; generating an enhanced social media post by overlaying the second content item onto the non-focus portion; and generating for display the enhanced social media post.