YouTube ratings explained

When watching a video on YouTube, you're given the option to like or dislike the video. Although the dislike counter was hidden from public view in November 2021, a community-made extension named Return YouTube Dislike aims to estimate the dislike counter on videos by taking the likes and dislikes of its users and the public like count. The extension won't be 100% accurate, but given that it has over 4 million users at the time of writing, it should be pretty close. It uses the following formula:
 * De = $D_{r}⁄L_{r}$ * Lp; Dr = dislikes from users of the extension, Lr = likes from extension users, Lp = public like count

This video made by YouTuber and former YTPer EmpLemon (formerly EmperorLemon) explains why dislikes are important to YouTube as a whole and why they should not be removed (obviously, YouTube didn't listen, but when has YouTube ever listened to the community?). The video gives a chart breaking down like-to-dislike ratios (the likes on a video divided by the now-estimated dislikes) into several categories. For simplicity, the like-to-dislike ratios displayed will be the minimum percentage required to qualify for that tier; any ratio that is equal to or greater than that ratio and is less than the minimum ratio required to qualify for the tier above will be considered part of that tier.

Now here's my own version of the chart, based on some quick research and several long-term observations and accounting for the fact that YouTube has changed since the video's uploading in 2019 (names of categories are also changed to reflect the fact that the like-to-dislike ratio is a measure of how much the community liked the video, not how much quality it has):