Chosen Solution

In your iPhone X YouTube video, you said we need to do a DFU reset to restore Face ID. However in the video, she just puts it in DFU mode and then clicks ok, then turns it on again. Is that it, or do we need to restore in DFU mode also?

From what I see there is no need to restore in DFU mode while doing this procedure. Just put it in DFU mode and click ok and you should be good from there.