Unfortunately Amsterdamlivexxx has recently started using a plug-in of some sort, not sure why but it annoyingly gives a "security warning" in IE.
Anyway it works and I haven't seen any issues with it.
Last update: Someone asked me where is the Amsterdam voyeur house and that free reception desk with the hot girl. All I can see is a typical who's online page with 9 to 10 models to wait for private shows.
If you are into voyeuring, you may try Bongacams where they have a category called "In Spy mode".
But ifriends has not just introduced multiple cams, it even allows you to have four views at the same time, unlike Amsterdamlive you can see only one view at a time.