No new videos on Nepal but I have seen a recent video on the Layap tribes of Bhutan. They are yak herders from the Bhutanese mountains and have a similar lifestyle to the Polyandry practising tribes of the Himalayan Nepal. There are interviews with the husband and wives and they tell you the positives and the negatives  of the practises  very frankly. You might get the whole video in the web but here is the link for an overview.

 - http://www.bbc.co.uk/tribe/tribes/layap/index.shtml