well, that certainly is an interesting challenge... I had a quick play and discovered that perhaps the quickest way was to enter preview mode, then browse mode upon closing the popup not exactly elegant... I suspect that there is a better way, but this works ok
Because I am also using FMGo, unfortunately the preview mode will not work. I ended up using a script step to make a new window, and then close the window in which the video was playing. Not very elegant, but it works.
I was having a related issue, but found resolution by using:
AVPlayer Set Playback State.
I was only having an issue with iOS...and this media call works in iOS. Now it's possible I'll have a problem with WebDirect but I haven't got to testing that yet.
Perhaps my details were a bit different.