The Curiosity video was the work of Bard Canning, who took a month out of his life to convert the 4 frames/sec. vid to 30 frames/sec. Ultra HD. The sound effects, of course, are synthetic, as Mars atmosphere is even thinner than the summit of Whitney.
That man should be offered a job at NASA. Or at least JPL.
The Curiosity thread
links to all the details at Jalopnik