Pronunciation: Bh and Mh
Are they both pronounced like V ? Or is Bh is more like F?
It depends on the word, if it's initial/medial/final, and the region (dialect), but generally they are both pronounced like English "v". There is a guide to pronunciation that Cambridge University put together:
The section titled "Those pesky BH, DH, GH and MH" should be what you are looking for.