https://support.google.com/youtube/answer/141805
https://creatoracademy.youtube.com/page/lesson/discovery#yt-creators-strategies-3
https://www.searchenginewatch.com/2014/04/18/5-advanced-youtube-seo-tactics-to-drive-more-traffic-to-your-videos-website/
https://backlinko.com/how-to-rank-youtube-videos
https://wistia.com/learn/marketing/understanding-audience-retention
https://tubularlabs.com/blog/youtube-watch-time/
https://www.tubefilter.com/2016/06/23/reverse-engineering-youtube-algorithm/
https://creatoracademy.youtube.com/page/home?tab=all&hl=en
https://neilpatel.com/blog/youtube-seo/
https://www.youtube.com/watch?v=Q_g7D0Z1iKo
https://www.tubefilter.com/2016/05/12/youtube-watch-time-metric-algorithm-statistics/
https://backlinko.com/youtube-ranking-factors
https://www.youtube.com/watch?v=hPxnIix5ExI&list=PLpjK416fmKwQK6_REczCaBQ1x1jyHvZAF