Unfortunately, it seems like my version had a misprint and I'm wondering if the same has happened to others.
You will see in the video that in the "first year" section, there is a page for each month. After 7 months however, it jumps to 3 years, then 4 years, then 5 years and the footnote changes from "your first year" to "2-5 years old". It completely skips the rest of the months, and most importantly the 1st year milestone.
Then, later on in the "2-5 year section", the 3-5 years are repeated once again. This makes it seem like there was a misprint in the "your first year" section as those years are repeated while crucial milestones are completely missing from the book.
I have started a return and have left the manufacturer the same feedback, hopefully it is just a one-off but wanted to warn others to leaf through the book and ensure your pages are all there and make sense.
*Update: I was able to return the original book and order a new one. The second one is correctly printed! We have been using the book for a few months now and are really enjoying it, very nice quality and beautiful aesthetic. Would recommend, again just double check there was not a misprint when yours arrives!