For reference, 1080p was in 2009: https://blog.youtube/news-and-events/1080p-hd-comes-to-youtube/ https://blog.youtube/news-and-events/1080p-hd-comes-to-youtu..

For reference, 1080p was in 2009: https://blog.youtube/news-and-events/1080p-hd-comes-to-youtube/ https://blog.youtube/news-and-events/1080p-hd-comes-to-youtu... while ads came out much before then: https://blog.youtube/news-and-events/partner-program-expands/ https://blog.youtube/news-and-events/partner-program-expands...