Why are there closeup videos of solar flares, but it’s too hot on Venus and Mercury to send rovers?
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You don’t need to get close to the Sun to take a “closeup” video of solar flares, you just need to zoom in on the flare using a telescope with high magnification. Most space telescopes that study the Sun remain very close to the Earth, either orbiting the Earth directly or stationed at the L1 Lagrange point a hundred times closer to the Earth than to the Sun. You can even use a ground-based telescope to study the Sun, provided you have the proper filters to protect the scope and/or your eyes from its light.
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