What company is one of the most common sponsors for Youtubers to have? What do the ads for #1 typically involve? Does #2 involve someone giving audiobook advice?
Audiobook
Audible is one of the most common sponsors for Youtubers to have. Audible is an audiobook subscription service.  Audible ads typically involve discussing a book that the speaker has recently listened to.
recording of a text being read
Do Youtube viewers get unsolicited audiobook advice often?