pfflier has another video more under the planes as they take off. See his #22. Some ‘noise’ at 37 seconds.
https://www.youtube.com/watch?v=N5x8GSx6sGg
The one I referenced was taken down I found this one:
https://www.youtube.com/watch?v=schuuopLo3w
That is 0 mins and 8 secs into this video