Search as learning (SAL) is a recent research topic that emerged in the field of information retrieval. It investigates informal, web-based learning processes as they happen every day with the help of search engines. While highly active, the SAL domain still shows a strong focus on textual documents. This conflicts with research on multimedia learning in educational psychology: Humans tend to grasp and internalise new knowledge easier and more efficient when it is conveyed using multiple modalities. Thus, future SAL research will have to include multimedia aspects to enhance human learning.