Simon shows you maps - In 2010 80% of YouTube's top 100 most subscribed channels were created by YouTubers and only 20% by mainstream corporations or celebrities. By 2019 the big players
Top 20 Most Subscribed YouTube Channels in US【2019-May 2020】by Day - YouTube
Top 20 American YouTubers - Social Blade
YouTube UK: 20 of Britain's most popular online video bloggers | YouTube | The Guardian