The document reports on a study that examined students' perceptions of different uses of online video and its impact on social presence. The study found that students generally perceive video as the most effective medium for establishing social presence compared to audio and text. Specifically, students rated one-on-one synchronous video the highest while group asynchronous text-based discussions the lowest. Additionally, students agreed that video announcements, instructional videos, and video feedback helped establish instructor presence and they enjoyed when instructors incorporated these uses of video into their online courses.