Babbel first attempts of using interactivity in their videos was by using annotations in YouTube for their language learning videos.
Those videos showed a very high conversion rate compared to videos without interactivity, since they were more engaging and encouraged the viewer to be active and therefore keeps the attention span.
Check out this example below.
Being limited with the interactive options Babbel looked for other tools that could add the needed interactivity to their videos.
With Videopath they found the proper that could add the relevant content directly to their videos and give limitless customization.
Check out the example below.