Now instead of talking, let's practice a little exercise:
Link A (5 videos)
First video is known as the "Official video", the only one retained by the commission
Following 4 videos ... have been ignored by the commission
Link B (1 video)
That video is the same as the official one ... except for the soundtrack !
For the purpose of that exercise:
- crank up the volume
- take a timing between the yellow balloon … and engine spool up
Has anyone noticed that the second video, the one whose soundtrack does not match the official one, has been removed from Youtube? All the other "official" videos are still on-line.