Is it just me or is the video a word-soup marketing pitch of benefits, possibilities etc? 'Open yourself up to content, with adaptive cards'.
What does this thing actually do, and how does it work?
What does this thing actually do, and how does it work?
This video is a good walkthrough covering the type of scenarios that are enabled with their use: https://www.youtube.com/watch?v=wT1yFr_j6IM