"A free add-on for Firefox that lets you watch YouTube videos on full-screen, without information."
Mozilla Firefox, of a very small size, that lets you watch YouTube videos without the added information. In other words, when you watch the video, you only watch the video, nothing more. This way you`ll feel like you were at the movies (hence the name Cinema).
With YouTube Cinema you watch the video in an independent tab with the advantage that you have a series of controls, at the bottom right, to increase or reduce the video viewing size.