What this looks to be, is a combination of a few animation swaps and a finely tuned macro.
I've actually been looking at animations a fair bit the past few days -- so I can tell which are in play, because I was actually looking to do something like this eventually.
all_b_cbt_pistol_standing_draw_pistol_holster
all_b_cbt_pistol_walk_aimed (there was also a firing version being used)
all_b_cbt_coup_de_grace
all_b_cbt_reload
all_b_cbt_ranged_flourish
all_b_cbt_pistol_standing_stow_pistol_holster
My first thought was that they swapped mood animations -- but having a ranged weapon equipped blocks those idle animations. So I'll assume they hid their chat box for a reason -- that they're actually swapping emote animations (and therefore spamming chat).
...So unless I simply haven't found a file where that'd be handled, I ran with my assumption that these are emote swaps.
I skipped the firing anim, and coup de grace. Video doesn't show that I included the aimed walking.
The macros I used are within the readme - cobbled together quick, but look good.
http://www.mediafire.com/file/3w3m4udqv467jv5/Pistol+Holster+&+Reload+-+By+Adaso.rar