World4ufree-u-cm-net-tlcity-hevc-dual-mkv

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: Standing for High Efficiency Video Coding (also known as H.265), this is a video compression standard. It allows for high-quality video at significantly smaller file sizes compared to older standards like H.264/AVC. : These are likely site tags or encoder group names

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These files are designed to be played on modern media software and hardware that support high-efficiency codecs.