As you scroll down the list of videos from oldest to newest, the lengths get longer. No longer are there any petty three minutes or five minute videos, let alone a one minute video. Now videos are all 10-25 minutes, the perfect length for maximum ad revenue.
Similar things happen to the thumbnails, which start containing more and more exaggerated, sometimes creepily-so, faces, reacting to absurd images that last for a fraction of a second in the video. The titles change too, becoming more and more outrageous, begging for you to click on them and spend hours watching anticipatory and 'exciting' content.
A lot of things have gotten better too, of course, and the amount of content that is available is amazing. But I do really miss when it felt like a place where people went to share videos and socialize, rather than where all the popular channels are ran like companies that follow the same clickbait format news organizations now also follow.