You no longer have to pick up an Android phone to watch YouTube videos with a Google Cardboard headset. YouTube has updated its iOS app to introduce Cardboard support, so you can watch any clip (not just virtual reality videos) using your iPhone and a low-cost paper box. You've already had 360-degree video support before, but this is a big deal if you'd rather not swipe the screen to view footage from every conceivable angle... or if you'd just like to immerse yourself in 2D. There aren't any other big upgrades here, but Cardboard support may be all that matters if you've been itching to try VR without spending a fortune or switching phones.