Not for what you're going to be doing. None of that is heavy lifting - you'd actually be fine with an MBA. I am making the assumption that you're a hobbyist photo/movie person given the software you plan to use.
The thing I'd be concerned about is the lack-of/expense-of internal storage space on the rMBP platform.
Your usage profile is pretty much the same as my wife's. The photo storage and movie editing can eat up a lot of hard drive space. While you can (and will) use external storage, it's nice to have a really big internal drive to make your computing experience truly - you know - portable. Otherwise you might as well get an iMac.
My wife needs a minimum 750GB drive to port around the family photos & movies and work on them wherever (and whenever) the children deign to give her the chance. The 750GB drive is an additional $900 on the rMBP platform. That's awfully steep. So until that price comes down significantly, she's "making-do" with a base 2011 uMBP-13 that's been upgraded with an additional 4GB and a 750GB hybrid drive, and she loves it. Total cost was less than just the upgrade charge for the big drive on the rMBP.
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