I'm recording an audiobook, using a music clip between chapters and scenes. I understand that I can use a standard license if I post it to YouTube. My question is whether I would need an extended license if I uploaded the same audiobook to Amazon's Audible.com audiobook distribution. Thanks.
“Audiobooks”? So, you are talking about audio assets? If you need an extended licence, you would need to be part of an Enterprise subscription. For anything behind a paywall, you would need an extended licence, if I'm correct. I didn't, however, refreshed my knowledge now.
Look here for more information on licensing: https://community.adobe.com/t5/stock/links-for-licensing-terms/td-p/11366788
(Disclaimer: As always with licensing, this is my interpretation of the rules. I think they are correct and advice is based on reading and interpreting the licence terms and on fair use for both the buyer and the artist/stock company, but I cannot rule out that my interpretation is wrong. I'm not an Adobe employee).