I have a bunch of webcam girls I've been happy with going all the way back to 2007. Just gotta learn how to do it. Many of the girls speak minimal English. In fact some of them have only been taught certain words by their employers. These are easy to spot. They'll repeat certain sexual phrases over and over, and because their grasp of English is so poor some of them you could ask to eat a phone book, and they'd say yes. Then they'd just play with themselves, never having any clue what you meant.
Of course if you're talking about the site advertised here, I've never used it, so I can't say anything about it specifically. Some sites have preview video. Means you're watching for free. Most girls won't do a anything specific in free video, but some will. But it can be helpful with the foreign girls because you can talk some into proving they understand and will do what you want. Once they do that, drop into the private chat, and enjoy.
Start with native English speakers. Tell them exactly what you want them to do before you ever go into the video chat. Make sure they're willing to do it. If they won't talk to you in free chat, move on. If you do go video and are paying, and they're not doing what you want, cut your losses and get out. As time goes on, you'll pick up a feel for the girls, even the foreign ones. Romanian, Russian and Czech dominate the Eastern European group. Seeing more and more South Americans now. Always been lots of Philippinas.
Patience and familiarization and you could find a lot of very good web models. You may even make some pretty good friends. I have.
Christopher