Indesign how to make hyperliks with automated page number in it

I do not see any url option in this panel but why would I use cross references in the first place if I do not want my hyperlinks to change in any case, they have to be fixed to the page number in a physical book. 

I tried with cross references without success. I have everything I want, the text is correct I do not want to change it in any way, just want Indesign to make the correct hyperlink from it. playinoneday.com/ELNcarols/#24 where 24 is the page number instead of playinoneday.com/ELNcarols/# why does it omit page number when creating hyperlinks? this is my only question.

At the end, it will be a fixed layout epub. But I export it as an interactive pdf and hyperlinks don't contain page number which is a only issue I have. It does not matter what format it will be if Indesign makes incorrect hyperlinks, does it?

It will not be reflowable, it needs to have a fixed layout and it is a physical book in the first place. I just want to make an ebook out of it to give customers a choice. It is a guide on how to play an instrument for beginners, and every song has a video recording with the guide how to play that relates to page in the book.