Placing object in AR 4.18 Preview 4

Hello, I am watching a tutorial because there really isn’t ANY documentation on ARKit, So I’m watching this tutorial, Getting Started With ARKit In Unreal Engine 4 - YouTube and at 13:11 he makes a reference to get ARKitCamera, and there isn’t such thing in this version. If any of you know how to fix this in the current preview, an answer would be much appreciated. Cheers.

You don’t really need to use it. It was simply removed in 4.18 version.

Is there any updated tutorials for the release of 4.18?

Not really, but you can read through this topic on the forums ARKit 4.18 preview 1 - official IOS 11 and XCode 9 - camera feed red? - Mobile Development - Unreal Engine Forums
Though right now there are just so few features regarding ARKit in 4.18. Remember that it is still in a preview beta version and is not fully released, yet. Will have to wait for final release of 4.18 to start making something with ARKit.