YouTube founder Steve Chen said Thursday the Internet giant is testing video-fingerprinting technology to guard copyrights of material posted at its globally popular website. "Today we're experimenting with video identification tools," Chen wrote in a blog posted online. "Once accuracy is achieved, the challenge becomes speed and scale to support the millions of people who use YouTube every day." Google-owned YouTube has been plagued with complaints and lawsuits by film and video owners that accuse it of not filtering copyright-protected works uploaded by users of the superstar video-sharing website. Full story at here.