I'm like that, too. Some fav movies on my iPads all the time.
My diabolical scheme is to hit 512GB. When the 256GB sd cards dip below $200, I'll get one of those to plug into my AirStash, and then I'll upgrade to the eventual 256GB iPad. That will give me as much storage as my laptop, which still has 100GB free. That's enough room for all my movies and tv shows, with room to grow for subsequent seasons of Archer. It should take a couple of years to get there.