Well, your screenshot does not show any audio, so that would be natural. Or am I missing something here?
Hello, Audio and video are imported separately in Photoshop. You do need to import some audio before you can change its settings, as Mylenium said.
The audio was indeed in there; I could hear it! But I found the fix:
Some Googling revealed that the timeline video sprites should appear *blue*, not purple as in my screenshot. I'm not sure how that happened, but I scrapped the project & restarted from scratch - and though I can't say what I did differently, this time the video sprite in the timeline was blue, and the audio flyout was there! So it's all good, thanks!
How did you change it to blue? I am having the same problem.