Promising, yeah... but that's a very young, scruffy Holmes, and he seems softer than I prefer the character to be. There's a rather David Tennant-ish quality to him at times.
Well, I guess "young" isn't a dealbreaker. Holmes was only in his 20s in A Study in Scarlet
, IIRC. And if he does have a more sympathetic side (like when he apologized to Joan toward the end of the video), maybe that makes him a more conventional character, but at least it differentiates him from Cumberbatch's Sherlock.
Anyway, I always feel cheated when I see something promoted as a "behind-the-scenes look" at a show and it's nothing but the actors talking about their characters. To me, as someone who first read The Making of Star Trek
when I was eight, "behind-the-scenes" material should entail a look at the creative process, the production, the nitty-gritty of how the work was conceived and made.