Hello and Good Morning! 
I was loking for some info about this:
I saw that info to create animations fullbody using metahumans in UEFN, I was trying to do the same but only with the iPhone app.
Everything is working, I recorded the frames and I can see that the recording is working because I can see the frames in the sequence, but Im not be able to see it on my metahuman character face.
Anyone knows some guide/video or something? I tried everything