I know YT 3D works on the Apple TV box. I tested it with my channel and set it to a favorite for my MIL. But we had to manually set her 3D TV to SBSh to view the 3D content.
Illya- Can you tell me which titles did not play? I have a few that are in 2D only. Some are private but I thought you wouldn't see those unless I gave you the private link. Also, YT sometimes has flagged my videos for copyright violations but all up there have rights contracts paid or are creative commons, like live street music recorded in the public fair use provision. YT uses a robot that flags music until you provide the legal cue sheets. When they do, I get notified there is a claim made on my content. If I ignore the claim they will delete my sound track. I've had a couple like that and when I got around to sending in the cue sheets, the sound track was restored. I also make a habit of spot checking older titles to be sure they haven't messed with any. Anyway- thanks for the feedback. I appreciate it.