In short, why does the the TV doesn’t need a fan to cooldown and PC requires one while dealing with high definition videos?
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I think most people aren’t even answering OPs question. Unless I’m mistaken, OP isn’t talking about rendering an 8k image like your GPU would when playing a video game for example, vs playing a pre-rendered video file.
The fact is, your TV does heat up. It has hardware dedicated to decoding video files (similar to what your GPU does when you watch Youtube videos on your browser with hardware acceleration enabled). If you notice a lot of TVs have gaps or grills in the back to allow for airflow so that these components can be cooled. You don’t hear fans because there are no fans in the TV They are typically designed to be very power efficient. Also, if they heat up past a certain point the TV will throttle and you might notice stuttering or a reduction in quality.
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