"Niconico (ニコニコ Nikoniko, lit. "Smile"), formerly known as Nico Nico Douga (ニコニコ動画 Niko Niko Dōga, lit. "Smiley Smiley Video"), is a video sharing website in Japan managed by
Users can upload, view and share video clips. Unlike other video sharing sites, however, comments are overlaid directly onto the video, synced to a specific playback time. This allows comments to respond directly to events occurring in the video, in sync with the viewer; creating a sense of a shared watching experience."