What I Saw When I Pressed Left

This is what I saw when I held left to move my cursor back a while during editing of my next Way of Kings video for Bulmer's Bookshelf, and I just... I just thought you ought to see it.

edit - Ok! Apparently I wasn't clear enough. So I was editing a video. Specifically, this video:    • Way of Kings Ch6: Bridge Four  

And I needed to track back a few seconds, so I held the left arrow key, which moves the cursor backwards across the timeline, playing the video backwards briefly. That's why there's no sound and I'm moving backwards. Ok. Are we all sorted?