HD video with sound from the surface of Mars
https://twitter.com/James7Holland/status/1362814591940648960
at the very end of the video, you clearly see the word "curiosity" so this is older footage, not new content from the Perseverance. also, given the very thin atmosphere, i don't think that sound can travel on mars... other than maybe wind on the microphone, if they even bothered including a microphone.
The team behind Ingenuity are not yet sure whether it is even possible for a helicopter to hover above the Martian surface. Mars' atmosphere is less than one percent the density of Earth’s, so it may be too thin for the helicopter to successfully fly. If it succeeds, then space agencies can add aerial exploration of Mars to future missions.
before launch the 'copter was tested in 1% air and it flew, so i'd certainly bet on it being able to fly on the red planet. blades have to spin between 3,000 and 4,000 rpm.
