Not sure who uploaded these videos, but they are all missing many tracks that play in these dungeons.Would expect Wowhead to know this, but the Soundkitentry ID's for the music in these dungeons can be found here: https://wow.tools/dbc/?dbc=zonemusic&build=10.0.2.46619#page=1&search=DGN%20100 , and https://wow.tools/dbc/?dbc=zoneintromusictable&build=10.0.2.46619#page=1&search=100%20DGN , the numbers under Sounds are the SoundKitIDs that have the tracks in them.
Nokhud offensive has some satisfying percussion going on. I don't know enough about music to identify the style, or what kind of drums they are. I suspect anyone with some kind of musical background will be able to identify them though?
I almost forgot about this article. That was more due to taking advantage of the Dracthyr's limited availiability on the PTR. Otherwise, I love the intensity.