It's great when it works. Servers appear to have constant hiccups or go down often.

Nice

I really love this extension normally, but now whenever I enable it YouTube refuses to load any videos on the website.

I was really enjoying this extension, but the last several days, it isn't working anymore. I reloaded it, but it still isn't working. I'm so disappointed because I really liked it before. I use Firefox, so if there's something I can do to make it work, I would love some feedback. I need this to work again if at all possible.

I really love this add-on. Though the newest update with the skip profile menu really isn't to my liking. If I want to support a channel I just want to quickly click the whitelist channel button and be done with it. I don't want to configure how the add-on should behave for every channel.
That is most likely a me thing though.
Everything else about it is top notch!

Being able to consume media without the fluff of sponsors, being reminded to sub, intros and outros built into the video makes this a special extension, especially when you can do it on normal videos and music videos. Not only is this a crowdsourced extension that everyone contributes to, but you can too! If you see a video not have the sponsorblock added, please contribute if it needs it!
It's fantastic at what it does and I cannot recommend it any further than the highest praise. Make sure to check out this developer's work. Very smart, very helpful and very user-friendly!

10 months later:
It seems I cannot mark a full video as "Unpaid/Self Promotion" without it going away upon refresh. This extension was phenomenal before, it can be again.

It works most of the time but the submission rules are unclear and they refuse to edit the wiki to clarify

On Android it doesn't seem to actually skip the sponsors but it highlights them, the extension also causes the full screen video to flip orientation to vertical when interacting with the video. Works great on desktop though

Great when it works, but prone to just breaking and not skipping sponsor segments, with no way to get it working again other than uninstalling and reinstalling.

Works all in all but has some minor problems. Sometimes it freezes on segments and there are numerous bad segments where you won't be able to upload yours.

with uBlockOrigin, some video still have segments skip at wrong time.(example: 0:10 - 0:20 is sponsor, SponsorBlock showed 0:10 - 0:20 is sponsor, but it will auto skip from 0:05 to 0:15)
2024/07/18 edit:
popular addon: Enhancer for YouTube™ > ✅Automatically select a playback quality
are cause this issue. please resolve this issue with each other since both are popular addons for youtube

If you ignore the snobby assholes who make nonsense, harmful segments towards small youtubers, it's not half bad.

Absolutely tanks performance when watching youtube videos. Finally narrowed it down to this plug-in. CPU temps spike to 90c+, thermal throttles and brings the performance down.

To dev: Please let me know if I can provide logs or something to help resolve this. This is a really handy extension but its unusable in its current state.

Device: mid-2014 Macbook Pro 13 inch.

Suddenly, advertisements began apper, which I had long forgotten about, apparently YouTube had created a countermeasure. Fix please)

fantastic when it works. major stability issues, frequent outages, recently it has been highlighting sections but just not skipping them. frustrating.

It skips the ads, however, often it does not show green sections on the timeline, nor the adjusted video length in brackets until I refresh the page, then they both show up.

This started happening around a week ago. Before then it was working perfectly.