Keep sync timeline and video in player

Hello Michael, 

Thanks for reaching out! 

One way to use the Player's seekbar to control a video is to make sure that the duration of the video is as long as the length of the timeline, and then enable the seekbar option below:

I've included a sample project file so you can see this behavior in action. If you're experiencing a different behavior from the one I just described, would you be willing to share a copy of your project file here or in private by opening a support case so we can take a closer look at what's happening? We'll delete it when we're done testing!