Our sun (a star) has nothing to do with a rogue black hole roaming into our solar system.
"And a black hole would be nothing like this video, the earth would be stretched flat before the black hole got anywhere near this close."
Where does this joker get his information? See end of video. The Earth, subjected to the gravitational pull of a Black Hole retains the shape of a sphere, until the last remnants of Earth's core are vaccuumed into oblivion.