The incident report, highlighted by the video, is very frightening; it begs the question what if …
What if the 737 commenced take off shortly after the 747 started a GA.
E.g 747 at 1 nm, say 150 kts GS (2.5 nm/min), it would loose contact with 737 almost immediately (downward view < 15 deg during GA). 747 at the threshold at +24 sec, and at 1 nm along runway at 48 sec elapsed time, altitude xxx ft.
737 starts takeoff at (say) +12 sec, lift off at +36 sec, climb to xxx ft by 48 sec elapsed time, approx 1 nm from threshold.
Same way, same place, same altitude, both a/c blind to each other!!!!
Did any of the management ask “what if” the standard ATC procedures failed?