I got my GF an AppleTV before Xmas. She has an iPad and an iPhone 5, no mac.
I loaded 4,000+ photos of hers from my work computer (iMac) using her iCloud Drive.
All the photos show up on both devices, but for the life of me, I cannot get AppleTV to see or show the photos! Ugh!
I've not kept up with Apple lately, I still run SL on my original intel iMac (can't upgrade OS-it just won't die), I have a 4s running iOS8. Sold my ipad a few generations ago and sold...