https://youtu.be/Kf5W4OsZTP4?list=PLEURHB7YjqCYhbBx1fy81rVIcy3G_ZDfX
This is a playlist from Fatboss TV from the Legion Alpha. Though this is probably outdated with damage values, the overview of the fights give a good visual compliment to the Wowhead strategies linked below:
http://www.wowhead.com/news=259258/nighthold-raid-strategy-guides-for-all-bosses
Have a great week everyone!