Sound piracy, ripping music off YouTube is a total no-no, especially for those who want to live by standards. As a working DJ, you should follow the code of conduct or in simple terms the ethics of music. Buy music from good sources, as this will not only save valuable time but there will be fewer chances of files being corrupt or not being read by DJ gears. Your audience will pick up on the distorted sound, especially in clubs with high-quality sound systems. YouTube should only be your guide to finding a true gem of a song and a guideline to taking the step to find that track at a more than decent quality.