this post was submitted on 30 Jul 2024
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I don't think DNS black holing was ever effective against YouTube ads. I use mullvad with a DNS filter for ads + uBO and still got served a few ad placeholders from YouTube in the past 10 days. I believe the actual ad was blocked by uBO, not the DNS filter.
You are correct. Google serves ads from the same domains as the actual legitimate content therefore sending those requests to null via DNS blackhole would simply block YouTube entirely. UBO and other browser extensions strip out or work around the problematic code itself to render a functioning page without the ads.