User-made YouTube videos have been limited to 10 minutes almost since the beginning, but now YouTube is ready to give people 15 minutes per video instead.
YouTube says its Content ID system makes the extra five minutes possible. With all major movie studios and music labels using Content ID to sniff out copyrighted material, and the technology improved enough, YouTube can afford to relax the upload limit, which was introduced to keep pirated television shows and movies off the site. Content partners, such as CBS, have always been able to upload longer videos, including full-length television shows and feature films.
Source:
ZDNet