Video EEG is the same as an EEG but with a video. The study is completed over a few days in the hospital to hopefully witness a seizure. Patients or caregivers could be asked to push a button to indicate when a possible seizure event is happening, or they can be monitored real time by a specialist in the Epilepsy Monitoring Unit (EMU). Being able to witness the seizure, and correlate it to the EEG, can be useful to determine seizure activity. A video EEG is often more useful in diagnosing HH and gelastic seizures, as subtle facial changes and eye movements can be identified and correlated to EEG activity.