It wasn't very robust here. I have a slow dsl connection and and NTSC camera on linux using VL2. When I started up I saw just a bar static across the top of the video. I closed the tab the flash was running in, and soon my firefox became unresponsive with screen smearing.... I had to manually kill all firefox related pids, and restart.
I'm using Firefox-3.0.5 and Shockwave Flash 9.0 r124