2" quad (also called quadruplex videotape, 2-inch quad or just quad) was the type of videotape used exclusively in the recording of Doctor Who stories from An Unearthly Child through to The Five Doctors.
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By site policy, all video must come from the official YouTube channel of the copyright holder — typically the BBC or its licensees. It's likely that no such video exists. Or maybe 2" quad is a subject which was never caught on video.Only admin may add videos to this site.