The simplest VOD applications treat InfoVision server as a "glorified" digital VCR with a huge stock of readily accessible prerecorded tapes
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Movies -- With granularities of around one hour
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Videotaped lectures -- and which can be restarted, rewound etc.
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Interactive VOD will have granularity of order a minute
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"Browse" text or video indices to form customized "channels" such as CNN or Reuters which provide several hours per day with textual index
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Quite practical (modest cost) to material spanning several years
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Use close captioning to get text automatically
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Can use same approach as for text -- relational databases -- to search for material
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