How to use Composure with VIVE tracker to move the camera?

I’ve got a couple of questions regarding the tracker data so it syncs up with live video and CG.

I was looking at the MR plugin sources and saw their tracker delay code that seems to be attached to Engine/Source/Runtime/HeadMountedDisplay/Private/MotionDelayBuffer.cpp
This seems to be part of the main game engine, is it always active and can it be set manually so all the tracker data is delayed?

Also, if you are using LiveLink mocap data along with a camera and pro video card that supports timecode, does the video, cg and livelink data all get synced up by timecode automatically or do you have to do something?