When is something a web app and when is it synchronized media

I have been working to assess and find a process for creating accessible
eLearning modules using Articulate Storyline 360.

The content of the "slides" within the player is coded as a bunch of svg
images, including the text. They are hidden using aria-hidden, but screen
readers are provided with a hidden text that receives focus
programmatically when the user uses the arrow keys to navigate.

Visually, focus is indicated appropriately and synchronized with the screen
reader.

I hate it as a developer, but as an assessor of WCAG compliance, I am
unsure how to treat the content within the player. Sometimes it is static,
sometimes it is animations accompanied by audio with optional closed
captions, and sometimes there are buttons to interact with it.

Do I treat the content within the player as synchronized media?


*Matthew Kreiling*

We're all in it together.

*"To live is so startling it leaves little time for anything else."*

—Emily Dickinson