There is official cardboard app for iOS: https://itunes.apple.com/gb/app/google-cardboard/id987962261
Cardboard puts virtual reality on your iPhone. The Google Cardboard app helps you set up a Cardboard viewer and includes a few experiences to get you started
(but doesn't allow to watch existing YouTube videos)
There is support page for 360 degrees videos: https://support.google.com/youtube/answer/6239930
With Cardboard and the YouTube Android app, you can even watch 360 degree videos for an immersive experience
(emphasis mine - feature is supported in Android - not iOS)
EDIT: I did some more research
Then type #360video into YouTube, look for the VR icon and strap on a viewer to see 2D online vids via your headset.
(confirming with the author)
- https://old.reddit.com/r/GoogleCardboard/comments/3ba1io/was_cardboard_support_for_youtube_on_ios_disabled/cskjpsz
https://old.reddit.com/r/GoogleCardboard/comments/3ba1io/was_cardboard_support_for_youtube_on_ios_disabled/
Is there an app (either paid or free) that allows to display video in cardboard format on iOS devices?
As of Jan. 27, 2016, Google has shipped 5 million Cardboard viewers.
- if you add all the cheap copies available on eBay... (that would be a big number) My point? Hello world, VR is no longer geeky, it's in the mainstream"