I've read a few things made with ArcGIS StoryMaps. While focused on interactive maps, it looks like it can be used for general multimedia stories as well: https

I've read a few things made with ArcGIS StoryMaps. While focused on interactive maps, it looks like it can be used for general multimedia stories as well: https://storymaps.arcgis.com/ https://storymaps.arcgis.com/