Utilize the input text as a context reference, choose the right relationship between television and Video on Demand from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

Rentrak's television ratings service is the only fully integrated system of detailed nationwide satellite, telco and cable television viewing information from more than 36 million televisions and Video on Demand viewing from approximately 120 million TVs, including granular information for television stations in all 210 markets projected across the United States.

Answer: distribution_format