data storage devices for movies on ios 8 ipad2

Perhaps one of this would help:

HyperDrive - The World's First And Only iPad Hard Drive

Carry 750GB of HD video and photo, always accessible to the iPad

Airstash
"Easily access, transfer, and stream your files from AirStash® – the pocketable wireless flash drive for iPad, iPhone, and iPod touch! This app requires an AirStash device in order to work. View, import & export photos, wirelessly stream videos, music & podcasts, and view documents stored on your AirStash. AirStash+ is an enhanced alternative to the built-in web interface adding features only possible with a native app."
http://www.airstash.com/

Seagate Wireless portable hard drive
"The new 500GB Seagate Wireless portable hard drive is the company's latest HD designed specifically for use with tablets and smartphones like Apple's iPad and iPhone."
http://www.macrumors.com/2015/01/04/seagate-ces-2015-new-products/

FlashAir™ II Wireless SD Card series

--Share photos & videos wirelessly

--Capacity up to 32GB

--Supports simultaneous access from up to seven devices

I had not though about the DRM issues. I doubt an external device would work. These devices work like a web server streaming the video.

Robert