One comment I have gotten from both my team and from learners is that there is not way for a learner to know when a button has been clicked. For example, I use a lot of tooltips with video and audio to highlight different parts of the page for learners to focus on. It would be great if after they had clicked a button, if it showed that it had been clicked. So that if I have multiple buttons on a page, they don't get confused about which they have watched or listened to and which they have not.
