The 'State of Video' October 2018 report from GroupM discusses the ongoing challenges and trends in the video advertising landscape, highlighting continued declines in linear TV ratings and shifts toward addressable advertising. The report notes the rising influence of OTT platforms and the complexities introduced by skinny bundles, while emphasizing that linear television remains effective despite a lack of new formats. Additionally, it explores the evolving definitions of video and the need for advertisers to adapt to diverse viewing behaviors across various platforms.