Adblockers may use more than the URI, but it starts with the URI and if it does not match, then it does not block.<p>If a video file is served from cdn.example.com&#x2F;video&#x2F;?file=3w0rjwo, then have a DoubleClick ad serve from cdn.example.com&#x2F;video&#x2F;?file=0239fjad with phony HTTP headers including mime type.