YouTube (YT) disabled the Thumbs Down (Dislike button) so we can no longer see easily the ratio between Likes and Dislikes.
I have devised my own rough way to figure out if a YouTube video is Good (worth watching) or Bad (likely not worth watching) by determining the videos
Likes_to_TotalViews_Ratio.
Likes_to_TotalViews_Ratio = (YT Videos # Likes) / (YT Videos # Total Views)
If a YouTube video has a
Likes_to_TotalViews_Ratio < ~2% (0.00 to 0.02)
A YouTube video is probably Not Well Received and previous viewers didn't like the video and/or the content of the video.
>= ~ 2%-ISH (0.02 and higher)
A YouTube video is more liked and likely more worthwhile to watch.
>= ~ 3% or greater (0.03 and higher)
A YouTube video is Pretty Well Liked and received or viewed as worth people’s time to watch (the higher % the more well liked).
NOTES:
This is my own devised system based on my analysis. I develop databases and thus have decent amount of data analysis experience too and over time you start seeing patterns in the data…
I hope this thread is not deemed too Off Topic, but Dave mentioned how much he did not like the removal of the YouTube Dislike button (thus in effect the more accurate Like to Dislike ratio). Dave even poked fun at (and duped) YouTube on his EEVBlog2 100K subscribers Silver Award Plaque saying, “Bring Back The Dislike Count” .

With videos with like say >= 500k+ISH views this “might” no longer apply (I think people say oh, that video already has thousands of likes and do not need anymore and people will often no longer bother hitting the like button). So, sometimes you get something like a super popular music video with 0.5 % (0.005), but with millions of views thus you know it is very popular and likely people gave up clicking Like...
I know some forum member(s) are going to find an exception or two or more, but give it go and you will find it works “roughly” most of the time…