Audio not playing in Chrome

Using all the wonderful advice above, I'm closer to resolving a similar problem, but not there yet. My module starts with video and using the trigger to play media when timeline starts, it works fine in Edge.  When I use the same trigger in Chrome, the autoplay starts but there is just a frozen screen with no audio but there's movement in the progress bar at the bottom.  If I press the start button, the video starts playing, but it is not in synch with the progress bar and so the video stops mid-stream when the end of the bar is reached.  It then jumps to the next slide and plays the rest of the module just fine.  Also the replay is fine.  Can you help? I've attached the file.

Also, I've tried working around this issue by inserting a slide before the video. This works in Chrome but is clunky. Sometimes it will work fine in Edge, but at others times the wheel literally keeps spinning.