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. https://mediafem.com/the-future-of-video-ad-spending-out-stream-vs-in-stream/
blog article
THE FUTURE OF VIDEO AD SPENDING: OUT-STREAM VS. IN-STREAM
Video ad spending skews less native because in-stream video ads are hugely popular with advertisers. These video ads are found on ad-supported over-the-top (OTT) services like Hulu and Roku and are even more prominent on YouTube, which alone will account for 11.5% of US digital video ad spending this year.Social networking sites like Facebook, by contrast, still make most of their video ad revenues on native outstream formats like in-feed ads. But this could change in the future. Almost all social video ad spending went to native formats in 2017 (99.5%), but that number is expected to fall to 96.2% by 2020. READ MORE