Still unclear.
I've tried to track down a definitive answer, with no luck. Everywhere I've looked seems to say that releases or posted disclaimers are required.
Releases are used to avoid any conflicts and to ensure people have 'agreed' to their zero compensation. So no one comes back afterwards and challenges the assumed rights. To avoid 'I didn't know.. blah blah blah' - people are just cautious. They may also grant use of someone's likeness (more on likeness in a minute..). From there, if you are out in public, you are fair game to be photographed or videotaped.
What you do control regardless of where the video/photos were captured is the use of your LIKENESS. Known as 'right of publicity'. Basically, you own and control your likeness aka.. makes up your identity and makes you noticable.
An example: you may be able to take a photo of Tom Cruise while he walks through the airport.. you own that photo, its copyright, and you may legitimately sell it, publish it, or whatever without Tom Cruise's permission. But what you can't do, is take that photo, and use the image of Tom Cruise to infer some sort of endorsement, promotion, or otherwise infer Tom Cruise's support or participation.
The 'identity' of Tom Cruise.. is his own intellectual property. While you may capture it freely, you may not 'apply' it freely without his permission. Likeness also applies to other identifiable traits such as a distinguishable voice.
So in a situation like this.. when someone is just moving around in the background.. and would not be seen enough to stand out and infer some sort of explicit participation or support.. they'd argue they were not using your likeness at all and you were just captured while out in a public place.
The other dimension here is that this is private property - and Disney has the right to control filming there. Nevermind if there are any county/st ordinances on commercial film making in terms of permits required.