About the video of Air China in JFK: I don't think the controller speaks too fast. Maybe a bit...?
But the Air China pilot has huge problems with a simple taxy clearance!
Can he read a taxy chart? A map?
And we see his english is way below ICAO level 4
! WHAT is he seriously doing in the cockpit of a 744 or 777 ? On intercontinental flights? You have to have a minimum standard or you are a danger to your passengers and other aircraft! On the ground and in the air!
For Air france: it looks the training has not improved; the unions run the show and decide! nothing moves; and this confirms that BA and LH are much safer than AF ( see the rates, the statistics...)
FBW 390