I wonder if he's meant to be...shy? Embarrassed? Like he's supposed to be year one Batman, yeah? Like this is one of the first times he's worn the suit. I'd be pretty fucking nervous if I was a scrawny guy in a bat suit walking up to a dozen+ armed street thugs thinking Im gonna intimidate them. No way I would be swaggering like James Bond at a blacktie event.
Nerves...I wouldn't like it because Batman is more performative than most superheroes, but I could deal with it. My problem is that it's just bad direction and cinematography.
To the former, it's like the director told Pattinson "ok, try to square your shoulders a bit more, now angle your face down a bit more, and slowly walk forward...NO! Don't move your arms or your head! I want you to stay as still as you can from the waist up as you inch forward..." Generously, it's the direction you might have given for a photoshoot, trying to get that one picture you'd use for a poster or promo image. But in video it feels very stilted and unnatural. That is not a confident walk, it is not a "fear me" walk, nor is it a "ok Bruce, act confident and they won't hear your heart trying to beat its way out of your chest" walk. It's a "I'm being careful not to move these parts of my body" walk.
To cinematography, it's down to the shot composition. I've said it before, Pattinson doesn't have an intimidating build and in terms of physical presence (and let's be honest, octave too) he'd have probably been a better match for Dick Grayson or Terry McGinnis than for Bruce Wayne. There are ways to compensate for that, however, with the simplest trick being an apple box, and getting the camera shots from the right angle. Fun fact, Robbie Coltrane - who played Hagrid in the Harry Potter films - is only 6'1" (185cm), and they made him seem upwards of 8' (244cm) through simple techniques like having him functionally wear stilts (the apple box technique) and forced perspective. For a cooler example though, I'd point to the effects work on Lord of the Rings
. It's the same principle, but they just built a better mousetrap, so to speak.
Back to the point however, pause the video and look at 0:43 and just look at it for a minute. The camera's high, it makes the actor look shorter by having the camera look down at him at medium-long range, and the shot is just empty, which draws further attention to how little space he takes up in it. I sincerely doubt was their intent, and that's exactly what makes it frustrating. It's something that they absolutely should have caught while shooting.