The service - which is backed by ITV, Channel 4, Channel 5, BT, TalkTalk and Arqiva - was unveiled at a PR launch fronted by the YouView chairman, Lord Sugar, this week. However, advertising is not expected to break until the autumn. It will be created by Adam & Eve/DDB.
Set-top boxes, priced at £299, will be available from retailers including John Lewis, Currys, Comet and Argos, while BT and TalkTalk will offer them as part of their broadband packages.
YouView allows viewers to "scroll back" seven days of viewing, search on-demand content and record and pause live TV.
The service was originally scheduled to launch in 2010.