In response to Lieberman's concerns, YouTube, which was acquired by Google in 2006, "examined and ended up removing a number of videos from the site, primarily because they depicted gratuitous violence, advocated violence, or used hate speech," according to a blog posted by YouTube.com.
However, the blog, entitled "Dialogue with Sen. Lieberman on terrorism videos," added that, "Most of the videos, which did not contain violent or hate speech content, were not removed because they do not violate our Community Guidelines."
YouTube took issue with what it sees as Lieberman's call to remove all videos mentioning or featuring terrorist groups -- even legal non-violent or non-hate speech videos.
"While we respect and understand his views, YouTube encourages free speech and defends everyone's right to express unpopular points of view," the blog said.
Lieberman responded in his statement that, "Videos produced by al-Qaeda and al-Qaeda affiliates showing attacks on American troops remain on YouTube's website and violate YouTube's own community guidelines. Those videos should be taken down immediately."