In regards to Hobby/Recreational flight we are in sort of a "half way there" type of situation as the rules are still being developed and as such currently incomplete from a purely technical stand point. The FAA has built several "opportunities" into their rules allowing more reach and enforcement in some areas. One such curcumstance falls in at #3 which states:
Follow the safety guidelines of a community based organization.
Currently there is only one such CBO although I suspect this could change in the future. Just for fun here's the one existing/acknowledged CBO's guidelines that comes into play in your flight:
"I will not fly a model aircraft in a careless or reckless manner. "
How could flying directly over and hovering over traffic NOT be considered careless or reckless? Also local laws about careless and reckless behavior could (most likely would) come into play here with your local authorities.
" I will avoid flying directly over unprotected people, moving vehicles, and occupied structures. "
Now I do believe "occupied structures" is a bit of a wide sweeping term and needs to be clearly defined.... but the rest of it is pretty cut-n-dried.
Moving Vehicles is pretty straight forward a NO-NO.
Why not just take this directly to the "Horse's Mouth" and contact your local
FSDO (
now called FSO) and run the scenario by them. To be fair and honest describe to them exactly what you did (
or maybe word it as something you MIGHT plan to do) and paint an accurate description of what your video entails. I wouldn't actually "show" them the video though as it's not going to fair well for you in that instance. At the very least you'll get some "educational time" with an FAA representative and worse case... who knows....
Just to help you out here's a link to where you can get the contact information for your local FSO:
www.faa.gov
Here are some links to the items I've quoted above:
www.faa.gov