Nobody can beat search engine traffic and nobody can beat Google.Can you mention any "video ads marketplaces" other than the Youtube advertsing program,which is owned by Google?
There`s is a huge drop of search traffic for keywords about bitcoin, cryptocurrencies and ICOs.I guess that when the bullish trend ends and the price is far away from it`s all time hights,90% of the crowd just isn`t interested in cryptocurrencies.That explains the drop in views stats.