walking_carpet said:

the head looks to small compared to the face

the one in bob iger's selfie looks more like him

It's possible it isn't Peter Mayhew in costume (in either the clip or Bob Iger pic), but I think it's really because of the darker lighting in the clip and his fur is slicked down that may have his head appear small compared to the Bob Iger pic. That's got to be Chewie though, whether or not it's the exact same OT bandolier - that style of bandolier is what identifies him. I'm not betting on this but it isn't likely that JJ will stick a bandolier that looks anywhat similar to Chewie's on any other Wookiee.