With regard to the apparent blade moving the wrong way, the NASA sight has the same video and gives it this caption.
The Ingenuity Mars Helicopter’s carbon fiber blades can be seen in this video taken by the Mastcam-Z instrument aboard NASA's Perseverance Mars rover on April 8, 2021, the 48th Martian day, or sol, of the mission. They are performing a wiggle test before the actual spin-up to ensure they were working properly.
Credit: NASA/JPL-Caltech/ASU