Why is there a noise and big flame when starting my gas cooker?
This sounds like delayed ignition where a greater than normal amount of gas is present when the burner gets spark.  If you manually initiate the spark independent of turning on the gas you might try starting the spark first and then turning on the gas.  Also the spark ignitor may be slightly out of place, moved during cleaning, etc.  There are all sorts of stoves.  A photo of the controls, burner and ignitor would help.  You could also check the manual.  

After viewing/hearing the video it seems to me the ignition is rather forceful.  This might point to the regulator and too high gas pressure.  A technician could test the gas pressure after the regulator.