UT Video Codec Suite is a fast, lossless video codec, developed by Takeshi Umezawa and released under the free GNU General Public License.The algorithm of UT video builds on the Huffman code to.UT video was as an alternative to HuffYUV developed which allows for better compression and has appeared both as x86 and x64 than build. It can handle the color spaces YUV422 (ULY2), RGB (ULRG), RGBA (Ulra) and, most recently, YUV420 bypass (ULY0).