Very comprehensive, a valuable guide for any serious language learner. I love the Shazam app to. My history goes all the back to 2017, and I got a lot of Russian songs from it. I totally agree that the nuances of subtitles are not that important considering the volume required. People have been learning with "bad" subtitles for decades before apps like language reactor gave the machine subtitles. And they more or less figured it out.