Thanks!
The video offers yet more proof that Disney/LFL approached Tarkin two ways. One, by having Guy Henry stand in front of a blue-screen wearing a headcam rig, to produce a CGI Peter Cushing; the other, by having Henry on set in full costume and makeup, to play the role without worrying about CGI at all.
Here’s Henry as Tarkin in the CGI motion-capture rig:
And here’s Guy Henry on set, playing Tarkin via simple recasting:
Here’s hoping we get to see that latter version of the film at some point.
It’s most likely early camera tests and rehearsal footage (notice no screens behind him are switched on). There’s also a shot of him in full costume with a Leia stand in which was never to be part of the movie. They most likely got him to act out the scenes in full gear for the CG techs to nail the lighting