I find this a bit tricky to critique without being able to see more angles. My instant thought is that it's not quite right. I can't put my finger on it from this short video. But, I would suggest, if you haven't already tried it, is to film yourself acting the part out, and I do mean acting it out, not just taking the lid off a jar. Make sure you know the type of performance you want to animate, act it out on video and use that as a reference to create you animation. Do it several times from different angles, edit them all together and really get a feel for it.