@Maria Bellido If you look inside of many Amazon KDP books you will see that QR codes exist and are allowed. In an ebook you can even use LINKs out to other things. but if you plan on doing both print and an ebook then a QR code is much better. I would provide both the QR code as well as the link because a person reading on their phone can't then scan a QR code, and person reading print can't click a link. ALSO Provide Text Alternatives: Always include the raw URL in plain text beneath or next to the QR code. Not all readers have smartphones, and some accessibility tools read text but cannot process images. I would use something like YT or Google drive to host the video because your book will be on Amazon forever. and often times when people use a website, in a year or two that website no longer exists. ====================== More indepth answer: what is posted when you ask Google: Amazon KDP strictly prohibits QR codes in A+ Content . Codes must not link to off-Amazon retail platforms (so NO affiliate links), contain unauthorized external file downloads, or promise incentivized reviews. ==>>>However, standard QR codes pointing to author websites or social media are generally permitted if used purely for reader engagement Permitted Uses - Engagement: Codes linking to your author website, newsletter sign-ups, social media, or other books published on Amazon are generally allowed. - - Bonus Content: Codes to supplemental story material or extras that enhance the reading experience (without making the book dependent on them) are permissible. - Placement: You can place QR codes as images within your e-book or paperback manuscript pages (such as in the front or back matter). Prohibited Uses - A+ Content Restrictions: KDP explicitly forbids QR codes anywhere within your product description page's A+ Content section. - Off-Amazon Sales Incentives: You cannot use QR codes to direct readers to purchase the book on non-Amazon platforms (like Barnes & Noble or Apple). - External Files & Giveaways: Directing users to download free PDFs, alternative e-book files, or external digital products is against KDP’s policy regarding externally hosted files. - Incentivized Reviews: You cannot use a QR code to offer rewards, discounts, or prizes in exchange for Amazon book reviews, which violates Amazon Community Guidelines.

wow @João Sebastião welcome, what a great story. Hey @Davide Altieri on Fiverr , you can get people with TikTok accounts to promote your stuff.. have you ever investigated that route? same for Instagram.. using people with established accounts to promo your stuff for you.. It is NOT organic since you are paying someone but most gigs aren't that expensive. Just curious about your thoughts on that. I looked on Fiverr and there are quite a few people who provide those services.

@Dennis Oware if you don't know about BookTok you may want to look it up . TikTok has been helpful to ALL TYPES of books from PDFs to Fiction to Puzzle books.. I don't personally do TikTok because in America. I was waiting to see if it would be banned or not, so you can do similar on Instagram and Pinterest too.. the Reels work in a lot of places but TikTok is a viral hive mind for buyers from the looks of it.

that is some TRUTH.. right there and I have fallen into the same pitfall.