Hey Steve, not bad for a first video!
I finally shot some pictures of my T-hawk setup and posted a page:
http://www.yb2normal.com/thawkcam.html
At the bottom you'll see my reference to "challenging urban environments"... there is a lot more detail about it here:
http://www.blackwidowav.com/questionofthemoment.html
Another thing to keep in mind is that 2.4ghz is a pretty short wavelength, so very minor changes in tx and rx position can yield dramatically different results. That's why my mounting method of choice is duct-tape
Regards,
Bill