Some of the most popular sites for viewing videos have started using noiselessly automation that eliminates extremist content of their pages, according to two people familar with the process.
The initiative is an important step for Internet companies who want to eradicate violent propaganda of their pages and are under pressure from governments around the world as a proliferation of attacks by extremists from Syria to Belgium or the United States.
YouTube and Facebook are among the sites that are deploying systems to block or quickly delete videos from Islamic State or other similar material, the sources said.
The technology was originally developed to identify and remove the video sites that had content copyright protection.
Search for "hashes" a kind of unique fingerprint that Internet companies automatically assigned to specific videos, allowing all content that contains that mark is erased quickly.
Such a system could detect attempts to re-hang content already identified as unacceptable, but does not automatically block videos that have not been published previously.
The two sources unwilling to address how human resources were intended to review the videos that technology identified as equal or nearly equal. They did not say how they identified as extremist videos at first.