I'm afraid Samsung doesn't guarantee compatibility with third-party devices.
So it seems better to ask the maker of the cam if he guarantees compatibility with your TV (so you can return it if it turns out to be incompatible) than the other way around. If you can't reach the maker ask the sales person in the shop.
Which mode/type of web cam is compatible with the following...
Samsung LE37D580K2KXXU TV connected to skype via an Android Dongle ?
I am having difficulty finding a"cheap" Cam other than the overpriced Samsung models !