Unfortunately I still have the same problem as in Point 4. above.
Running latest versions of High Sierra, iTunes, on 2012 MacMini, and latest TV OS on Apple TV 4K.
Basically I have a bunch of videos in iTunes, shot with my iPhone 7, in HEVC format. They show up in iTunes, play fine on the MacMini, but are invisible on Apple TV via home sharing. Videos shot on iPhone 6s show up fine.
Tried this via iTunes on Macbook 2016, same problem. Tried on Apple TV 3, same problem.
Seems ludicrous for Apple to bring in a new video storage format, and then make it unusable via home sharing. That it works via iCloud photo streaming is of no use when you only have a 2MB broadband speed.
If the HEVC format is not usable via Homesharing then Apple needs to make this clear upfront.