Add a control bar to all YouTube video pages so you can easily adjust volume, playback speed, video player size, advertising and annotation blocking, and other features.
Adde un barra de controlo a tote le paginas video de YouTube de maniera que tu pote facilemente adjustar le volumine, le velocitate de reproduction, le grandor del reproductor video, le blocage de publicitate e de annotationes, e altere functiones.