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Some common widescreen 16:9 resolutions /~megapixels:
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Moving up to 4k resolution, all but the most powerful and recent series Intel HD iGPUs are likely to show something more akin to a slideshow rather than a video at full screen/player resolution. on the lower end iGPUs per Intel CPU series (yes, Sandy Bridge* has a variety of different iGPUs, as does Ivy, etc.).
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Video performance depends very much on the screen resolution and player size, as well as the CPU/GPU and source resolution 1080 (Full HD) played back at full screen will produce more dropouts/skipped frames than the same video on a 720 (HD ‘Ready’) full screen or a video scaled down to 720 on a 1080 screen, esp.
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