Hans the pano is set with the building as a "hotspot" the top left is a "plugin"
I have two png files to mask part of the video hotspot, see here
http://www.jeffstarley.com/luminous_flux/ipod.html
This version has the png overlays set to zorders 22 and 23, they are red to make them obvious.
Wait for pano to load then click on the building to start / pause the video.
I am still working on sorting out the final version.
Hope this helps.
Jeff