More basically, I only see their ads because there are non-ad videos that draw me to the site and give me a reasonable average impression of the combination of

More basically, I only see their ads because there are non-ad videos that draw me to the site and give me a reasonable average impression of the combination of content and ads I see. Remove non-ad videos from YouTube and you would need to cut ads down by 50% to retain viewers like me.. the lower split of sharing on all content and/or lower viewer numbers will further dustress people with ads enabled on their content.. pushing them further into a death spiral of low profitability, poor content and inadequate incentives for the commercial content they apparently want.