There are a batch of reports out this week all dealing with OTT video – what it is watched on, how advertising is rising and what will happen to traditional TV. First up is TiVo, and its report has already been widely quoted, showing that US viewers consider their cable subscription services worth less and less. Its first survey question was about how much would you be prepared to pay for your top 20 pay TV channels. The graph below shows that this has fallen 12.3% in a single quarter, and really points to the growing confidence that US viewers have with narrower OTT services. They have never been happier to dump cable and this is reflected in their answers,…