HAHA! Resolved! I put the delays as you did but it didn’t work, then I realized why! I realized it when I used some prints for if the media player was loaded correctly or not and this is precisely the point, going to frame it all depends on the power of the machine, and probably your pc is faster than mine so to solve any doubt or told to move to next operation only when finished 
as in the example below …
thank you very much for your help