mh is /v/ at the beginning of a word in the Munster accent, which this speaker mostly tries to emulate. At the end or in the middle of a word, it combines with the vowels on either side to produce an "oh" sound. Unless preceded by i, as in "raibh", when it's /v/ again.
In the rest of Ireland, it's /v/ when slender, and /w/ when broad.
a loooong time ago, i attended summer school at OLLSCOIL NA HÉIREANN, GAILLIMH and the course instructor made clear that questions in irish should not raise at the end as in english. that said, i wonder if the pronunciation here, which clearly rises as typical questions in english, is a product of the computer splicing words together?