Linear TV's decline continued into 2018, with an overall drop of 3% across the first 12 weeks YOY. However, overall TV set usage remained flat at 4 hours/day, as time spent on unmatched activities—which includes Netflix, Amazon and YouTube—continues to rise.

Within the ever-shrinking pie of consolidated viewing to the TV set, share of viewing (SOV) to the ten largest channels remains broadly flat. Across the whole of 2017 and the start of 2018 the best performer has been ITV (main channel).

Several big-name digital channels are showing surprising signs of recent decline, including UKTV’s Drama and Viacom’s 5USA. It is too early to tell if these declines are a blip or a trend. However, they reflect stalling growth from the long tail of digital channels in aggregate. 

Engineering excellence and user generated content (UGC) have propelled YouTube to Facebook-level reach, with growing viewing in all demographics and on the TV-set

However, the commercial limits and PR risk of its long-tail content model have prompted a diversification effort involving subscriptions and long-form content

Becoming a major part of Google’s revenue amid fierce OTT competition would require YouTube to be more flexible in its partnerships with the AV industry, and a more aggressive go-to-market strategy

Even with the decline in linear television viewing, online video remains a small component of total video consumption. The growth area is unsurprisingly SVOD; subscription video now makes up about two thirds of the UK's digital video spend.

Netflix is moving from an aggregator of content to a "channel" in its own right, increasing proportionate spend on original programming, something that the public service broadcasters are unable to do for differing reasons. Amazon had a tough 2017 for video, and are still struggling to create a hit.

New Nielsen audience data suggests that the long-term "library value" of Netflix's originals may be overstated, while the BBC's iPlayer continues to be hampered by not really having a library at all.