Highlights the most worthwhile videos on YouTube. In addition to a ratings bar, there's also a blue "Power Meter" which measures people's enthusiasm for videos.
As of
This script calculates the enthusiasm people have for a video by comparing the number of 'Likes' to the total number of views and it displays the results with a blue 'Power Meter' below (or above) thumbnail images. This helps you find the best videos in search results and elsewhere and it also detects videos that perhaps aren't worth your time. It operates on a scale from 0 to 100. The script also shows a typical green / red 'Ratings Bar' (likes / dislikes), combining everything into a single bar like this:
The second example is of a rare case when the Power Meter is larger than the green 'Likes' bar. This will happen when the subject of a video is controversial and people are spamming 'Dislike' as a response to the controversy rather than the objective quality of the video itself. The Power Meter acts as a filter in these cases, helping you find the best videos about unpopular subjects.
If you want to customize the colors, the animations, or put the bar above the thumbnails, check out this UserStyle:
http://userstyles.org/styles/102386/youtube-ratings-bar-with-power-meter-userscript
The Power Meter needs an accurate view count to work. If YouTube has paused the view count (301+ views, more votes than views, etc) then the bar will have green/yellow stripes and the tooltip will say "View Count Paused".
I just recently remade the script from scratch, based on something I did a year ago called "YouTube Ratings Bar with Like Strength." I'm barely a programmer, and there are some things that could use some tweaking with this script, but it's working well enough for me to release. Every now and then the ratings won't show up, but I think that's more of a YouTube problem than the script - YouTube has a similar issue with just loading thumbnail images whether my script is installed or not. Normally all you've got to do is refresh and maybe scroll around a bit to get them back.
