Do not use default system players like Windows Media Player for this format. Instead, install one of these free, dedicated players:
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When Jaguar Paw runs through the cornfields at dawn, the sky shifts through subtle hues. On a standard 8-bit TV or encode, you see rings of color. On a 10bit encode played back on a capable panel (OLED or QLED), the dawn is a continuous wash of light. It is immersive. Do not use default system players like Windows
Because HEVC (H.265) is a heavy codec, your computer has to work harder to "unpack" it than it would for an older H.264 file. install one of these free