I noticed YouTube no longer shows dislike counts on videos, and I’m trying to figure out how to see this data. Is there any way to access it, maybe with a browser extension or tool? If anyone knows a solution, it would be really helpful. Thank you in advance!
You want to see YouTube dislikes? Oh, you sweet summer child. Once upon a time, in a land of transparency, YouTube actually showed dislike counts. But now? Nope. They decided the internet couldn’t handle that negativity. 
So officially, YouTube only lets creators see their own dislike counts in analytics—because apparently we’re too delicate to view the truth.
BUT… if you’re determined (or just really nosy) there’s a browser extension called ‘Return YouTube Dislike.’ Yup, some genius out there got annoyed enough to patch the feature back together. It works by using archived data and estimates from other users, so while it’s not perfect, it’s pretty close. You just have to install it on Chrome or Firefox, and voilà—you can once again bathe in the salty sea of public dislikes. Because why should YouTube decide how much chaos we consume, right?
Keep in mind, though, this depends heavily on community-sourced data, and it might not be 100% accurate. Also, who knows when/if YouTube completely nixes this workaround. Maybe they’re secretly conspiring to create a 100% happy internet bubble we’ll all suffocate in. 
Enjoy the view, if you go for it, and cherish the passive-aggressive power of numbers while you can.
There’s no “official” way to view dislikes on YouTube anymore since they pulled the plug on public counts (RIP, transparency), but if you really want to dive into the dark waters of negativity, there are a few options. As @voyageurdubois suggested, that ‘Return YouTube Dislike’ extension is popular; it pulls from user data and estimates, so you’ll get a general idea—though, let’s be real, it’s no guarantee of accuracy. It’s cool, but feel free to take the numbers with a grain of salt.
That said, I’ll play devil’s advocate for a sec: do you really need to see dislikes? Most of the time, the comments section will usually give you all the context you need if a video’s terrible, no? Plus, sometimes engagement matters more than straight-up approval ratings. But hey, if it scratches your curiosity itch, go for the extension—we’re all grown-ups here (mostly).
One thing though: depending on how YouTube evolves or clamps down on third-party shenanigans, extensions like this could become obsolete overnight. Use it while it lasts or just enjoy a world where ‘ignorance is bliss,’ I guess.
A simpler option works if you own the video. Open YouTube Studio, select Content, choose the video, then open Analytics and Engagement. YouTube still gives creators exact likes versus dislikes data for their own uploads. No extension or estimates needed.
For someone else’s vidoe, compare the visible likes with views and scan recent comments. This won’t show an exact dislike total, but it takes seconds and avoids unreliable third-party estimates.
Worth being clear about what those extension numbers actually are now. When YouTube killed public dislikes in late 2021, they also cut off the API access that made real dislike data available. So Return YouTube Dislike isn’t reading true dislikes anymore. For anything posted before the shutdown it leans on archived counts, but for newer videos it’s basically extrapolating from the subset of people who have the extension installed and click dislike. That’s a small, self-selected sample scaled up with math. The @voyageurdubois and @espritlibre ‘grain of salt’ warning is fair, I’d just say the salt is heavier than it sounds.
The creator route @cybersocket38 mentioned is the only one giving you a hard number, and that’s because it’s your own analytics. No trick gets you someone else’s exact count. That door is shut.
If you only care whether a video is disliked heavily, honestly the ratio guess is enough for most people, and the extension does that fine. Just don’t quote the figure like it’s fact. If accuracy actually matters to you for some reason, treat the number as a rough signal and back it up with the comments and the like-to-view spread instead of trusting one plugin.