Video not playing during timeline preview?

Hi Ted, 

Thanks for reaching out and letting us know what you're running into. It looks like Wendy has asked a clarifying question as well.

You mention that the issue is since the latest update, so I assume it was working as expected previously.

With your permission, I'd like to take a look at your project file to investigate what's happening. You can share it publicly here, or send it to me privately by uploading it here. I'll delete it when I'm done troubleshooting.