If you enlarge the video and freeze-frame certain images you can see that his vest seems to fold over from the left and button from the right, so the film negative does not appear to have been flipped. I've seen Twain with his robe or coat (unbuttoned or without buttons) folded over opposite the usual custom, but his shirts and vests are solid clues in this regard. Many right-handed people use their south paw to drink. With tea, perhaps this makes even more sense, leaving the right hand to stir with a spoon. At any rate Twain was right-handed, a topic that I think has been kicked around in this forum before, and the fact confirmed I think by a passage in one of his letters mentioning an injury to his right arm that hampered his writing, etc. On the other hand (sorry), Twain smoked both right and left-handed, but only one cigar at a time, of course. Kevin Mac Donnell Austin TX