You can force the preferred video position by adding the following string to the URL:

 &layout=..

 There are 5 options

1 Video left
2 Video right
3 Floating video
4 Floating slide 
5 Video and Slide equal size
6 Only show video in full size (since Videoserver 2.4)

Example:

http://nhtv.presentations2go.eu/P2GTV/viewer.html?path=0907-268/2009/12/11/1/video_post.wmv&layout=2