Video cameras have been traditionally used for photometry of lunar and asteroidal occultations and mutual events of planet satellites. Since recently they are also being used for identifying the times of minima of short periodic variable stars. Those cameras provide a cost-effective option for variable star research as well as an opportunity for typical occultation observers to also contribute to variable stars science.
You can find more information about this technique here.
Note that like the DSLR area, this area of research within VSS is based around the technique of observing, rather than purely the nature of the objects being studied. Some of the projects below therefore overlap with the research areas that focus purely on specific types of variable stars.