Wellms allows you to add a number of different types of content (text, video, H5P, SCORM, iFrame, etc.), but each of these types is a separate page, and there is no easy mix & match option. This is one of the biggest problems of platforms such as Storyline or Captivate that they have a certain template (in their case a slide, in our case a subpage with one main activity) that does not allow for the flexibility expected when creating courses.