Yes. The top transistors or MOSETs need a gate drive that is referenced to the Emitter (Source) of that transistor. (which is not ground)
In post #8 it is hard to make the two "Vcc=18V" supplies. (one shown)
In post #6 the supply is created via the diode and large capacitor Vb to Vs. (ask if you don't understand or read the data sheet) It only works if the output is switching on/off all the time. If you will leave it full on/off for a long time the circuit will not work well. (long time = 10mS)