It shows RatingBars which represents Like/Dislike Rating ratio.
As of
How to install UserScripts:
https://greasyfork.org/en/help/installing-user-scripts
Features and How to use:
It works on the top page, search results, video watching and channel pages, etc.
If a video has less than 10 rating votes, an appended bar is thinner.
* To make it work properly, you should have a YouTube Data API key for getting the rating data. Or you can get it now from Google Cloud Platform for FREE. (This script shall guide you after you installed this script and visited YouTube!!)
My YouTube Scripts:
https://greasyfork.org/en/scripts?set=361295
Twitter:
@kantankikaku
#YouTubeRatingBars
keywords:
Chrome, Firefox, Edge, Safari, Greasemonkey, Tampermonkey, Violentmonkey, UserScript
RatingBars, RatingBar, Rating Bars, Rating Bar, Sentiment bar, Spark bar, Rate, Like Dislike, ratio, percentage, preview, thumbnail
icon:
oNline Web Fonts