Does My Business Model Break Youtube API TOS? I understand from reading youtube api tos that selling youtube content is prohibited.

But here's how my business works:


I sell a physical product, let's say CDs.
On the cover of the CD is a QR code and a serial number, when you scan the QR code you will download my app.
Inside the app there are a few unlisted youtube videos, but they are locked.
In order to unlock it, you need to put the unique serial number that is on the back of the CD.


Why I make this model is to make sure that the people who watch my video have bought my CD. Now does this model break the youtube api tos or not?

https://developers.google.com/youtube/terms

Thanks
It is probably okay, see section 2 (bolding is mine):

The following commercial uses are permitted provided that You comply with all other terms and conditions of this Agreement:

the sale of an API Client


To get a definitive answer you should consult a professional legal counsel, so that the counseling that you get is backed by professional liability.