The short answer is that on the discovery pages the large “Playback” flash is telling you this.
Of course the longer answer is that this is something we tend to cover in our workshop courses and may not be explicit enough as we are transitioning to a more self paced remote approach for the basic course.
Thanks for the feedback, I’ll sticky this post for others in the meantime.
If you want to play with live discovery then one of the free Community Edition VAs may be what you want as that is empty and ready to go rather than prepopulated.