Watch her closely, she does the 22B hold upwards, then she goes for the first JF, after that though the next two hits are one motion as she swings it back-and-forth. The last hit is just another tap after that.
This initiates the start if the attack. She steps, then throws the whip up, then the second B throws it back down. THEN you hit Tap Tap-Tap Tap. The JF consists of 4 presses, the guard break attack at the end is automatic.
So After B - You start the JFs. Like I said, she goes for another swing (JF 1) then a double swing (JFs 2 and 3) then the fourth JF, which if you hit starts the auto-last hit.
The fact that I tap JFs 2 and 3 closer together is NOT something my buddy sees when I do it in front of him. He says it looks like I press the 4 JFs equally in terms of timing.
Second thing; The inputs MUST be clean. No extra Bs at ANY point, even before the JFs start.