How to transfer my videos podcasts from macbookpro to my new iMac ?

I've just bought a new iMac and would like to transfer my videos podcast from my MacBookPro without having to download all of them again. I was already successfull in transfering the subscriptions but they are asking to download again all the videos, including the free and the bought ones. That is a waste of time ! Isn't there a Apple smart way to avoid it ?

Thanks in advance folks !