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WikiPedia: Video http://hidefnj.com/video.html http://www.rewindmuseum.com/umatic.htm http://archive.wikiwix.com/cache/20140222172720/ht... http://www.screenonline.org.uk/tv/technology/techn... https://web.archive.org/web/20111027190500/http://... https://web.archive.org/web/20170514041225/http://... https://commons.wikimedia.org/wiki/Category:Video?...