Corporate video production covers a wide range of purposes from corporate communication, training and education, videotaping conferences and conventions, and sales. Video productions can be viewed live in-person, as is the case of I-Mag (image magnification) at a conference where a live video feed from a speaker is shown on a large projection screen; live remotely, as is the case with webcasting where participants can view a live video stream from their computers with an internet connection; or after the event on a variety of playback mediums, including playback from the original camera tape or memory based recording device or an edited version from a website video, optical disc, magnetic tape, or portable video device.