You may be OK - what people on the forum are referring to is copying and pasting to get images INTO indesign. This should be done by File>Place. However, once your images are in Indesign, they can be copied and pasted at will BETWEEN documents.
I think that if you want this content to appear in every page you should place de content in a Master Page this way you dont have to copy paste and it will appear in every page
Hope this can help you
Thank you! Yes, they're placed correctly and linked in the original document, I'm just copying and pasting that link.
Thanks, it is actually slightly different on each page, but thanks for the suggestion - I might be able to just override aspects of it on each page.
Yes you can do that