I got to know about a very simple, reliable and surprising by one of my viewers 'zajac1209'. It's a decoding method without pulling on the shackle and works great on the Yale, however seems to fail on other combination locks like the ABUS, LOCKWOOD or Burg Wächter.
Usual decoding of this lock    • (picking 528) Yale combination padloc...  
Decoding playlist    • (picking 115) ABUS 165/40 4-wheel com...