I'm always amazed at the people that try to the nuances and intricacies that are required to play an arcane mage...I just don't see it. While I agree that mages are complicated and very interesting to play in PVP, for PVE it's pretty much as the video describes.
Steps to play Arcane well in PVE:
1. AB until low on mana (around 20-40%) 2. Evocate (and mana gem, if necessary, to top off due to mastery bonus) 3. ABx4 4. AM (if proc'd) otherwise ABarr 5. Repeat 2-4 until Evocate has 30sec left on CD, then go back to Step 1 6. ?? 7. Loot!