One of the neat things about web annotation and hypothes,is in particular is the ability of the annotator to include links, images, and videos in their annotations. We’d argue annotations simply look better when they are more media rich in this way. But it’s also true that links and images/videos can help your arguments be more persuasive.
Inserting links (always good to support your claims or provide further information in an annotation) is pretty straightforward using hypothes.is. Here’s the link button: