I'm reading out loud

"persons" kann man zwar sagen, aber ist außergewöhnlich. Man sagt stattdessen: one person, two people oder a person, a couple of people, a few people.

Die Tonaufnahme ist ziemlich gut. Deine Aussprache sowie der Klang sind ausgezeichnet. Die Melodie ist aber ziemlich abgehackt, einfach weil du versuchst, schnell zu sprechen. Ein Muttersprachler kann ja schnell sprechen, aber es ist gar nicht notwendig. Wenn man zu schnell spricht, klingt es als ob du in Eile bist, dann ist die Geschichte nicht entspannt, sondern stressig zu hören.

Dein geschriebenes Englisch, meines Erachtens, ist super.

I haven't seen your video but will first correct your text:

(Note: The sentence is structured right but in speech, there is no melody. Melody is used more in music or songs.  Also, on your speech, the assessment is not too much about a person's preference but an objective assessment of how well you are speaking)

The chapter does not contain any major spoilers and is pretty much self-explanatory. Detective Bosch comes early into his office and finds an email from the murder victim's brother. It changes his perspective of the case, but he can't reach him on the phone. He also follows up on a lead that from a mysterious caller who used a fake name , 10 years after the murder.  Someone anonymous called in, who turns out to be a caller with a fake name. (Note: this sentence is grammatically correct, except the use of "who" on a person instead of "which". However, this sentence does not make sense because "anonymous" means without a name which contradicts "a caller with a fake name". I have joined up the previous sentence to include this point)

Nevertheless, Bosch narrows down the caller's real name because the call originated from a tractor dealership where only a few persons that day had contact with the customer whose name was misused as fake ID. Despite of his tight schedule to solve the case,  On a tight schedule, Bosch also has to squeeze in a recertification training.