Yeah it's definitely an issue with the screen rather than the source.
Also, sorry to waste people's time with that YouTube vid because the compression made it pretty useless.
Here's a Dropbox link to the original file, where the uniformity issues should be more apparent (download to avoid compression from the web player).
Wow, that's distracting. I had a small bit of reverse vignetting on my B6, but it wasn't noticeable most of the time, despite the corners tending to be the worst offenders. My C8 has a really bad spot on the left fourth of the screen where a thick pillar can be seen from the bottom to about halfway up, but you can't even see it in most
good content. Whenever I watch something that's near black, or dark grey though from a somewhat crappy source (1080p streaming) it stands out bad, and the only reason I didn't bother to return mine is because it was a "deal" through the mail.
The next time I buy a TV though it will be local. Two sets with noticeable imperfections (one of which is distracting), and at the price you normally pay for them, it's unacceptable. The second set is my bad mainly for not picking a C8 up at Best Buy last March when they had a deep discount. I was waiting to see if the C9 was going to have any significant improvements over it, and it didn't for the time.
Are OLED TVs really buggy/problematic? I want to get an LG C9 but I feel like so many people are having weird issues from dimming, color issues, banding, burn on, etc. These things are not cheap so I'm worried about risking buying one if they are so problematic.
The irony is that despite the issues that stand out bad from time to time (if the set doesn't just have abysmal DSE/vignetting in the first place), they still generally look better than the second best panel type. The only real problem comes from burn in (burn out) unknowns, which varies from panel to panel and also seems to primarily be an issue with the color red. Most people haven't had any
noticeable issue yet, while some have actually had problems in under a hundred hours. I personally haven't had a problem with that yet, but I tend to not put an extreme amount of time into any single game I play on it either. Aside from my B6 simply dying in less than three years anyway.
Get one locally, set it up and see if there are any noticeable uniformity problems
with content that you actually watch. Slides will only exacerbate the faults, and you'll often see uniformity problems with them that you won't actually be able to see in regular content. If there are some glaring issues, return it for another. Then do it again if the store allows it. Also get a four or five year warranty, and try to get one that covers burn in if you can.