You can do a bit more damage with 3 power launchers ..
1st to launch
2nd full charge
3rd uncharged
then you can dash in with 3PP6PP
that does a bit more damage than the 9KK variant
Its dead easy to land as well
That depends on weight class. 3pp6pp ender is not possible on heavyweight class characters when using 3 power launchers. These combos are for majority of the cast. (edit) Acually you can but its rather strict. Going for consistent combos
As for the heavy weights, if you're having trouble with the 3pp6pp ender .. you can simply end it with one of the enders in your vid .. It would still net more damage than the 9KK