Coming back to the Division in 1.5, Returning player guide.

A New character just hitting 30, right through to world tier 5 unlock. One thing the developers have added to the Division since launch was world tier difficulty. Whats this? Well mobs running round out in the game zone can be scaled up by the player to be harder, and consequently drop better loot.

These videos are just under 3.5 hours of a brand new 30 unlocking World tier 5. It could probably be done in 2 hours, and if you have friends or just mooch from your other characters all of 30 seconds.