I hope you realize that what you're asking is not Samsung's problem nor their responsibility. They neither restrict nor directly provide you with the means of downloading movies, or any other types of video. Anything "can" be downloaded. That's the beauty of Android. You just have to figure out where to find what it is you're looking for. That's what the Internet is for. All Samsung does is supply the hardware.
And Google Play's streaming policy has nothing to do with Samsung or their tablets. They're two separate companies. The fact of the matter is, media distribution is shifting away from tangible ownership and more towards remote access. It's the next step in the evolution of media, from cassettes & vhs (when I came along), to CDs & DVDs, to MP3s & MP4s, to streaming for everything (though I'm not TOO fond of this myself). Getting ahold of media files requires a bit more "outside the box" resourcefulness these days.