Has anyone else noticed that some Chinese dramas add extra background tunes to the already existing background music. This is also there when the episodes are released on the 'official' YouTube channels. 

This leads to a noisy episode where the dialogs can't be heard properly. This isn't there when you watch the same episode on netflix or Viki

Noticed that also, as at times seems almost like another movie breaking into the one being viewed now 

I guess it is because of copyright.