Taken from PSNtrophies:
Dragon Age: Inquisition
Welcome to the quest for the Red Lyrium Reapers! As with any quest, there's bound to be treasure at the end of the journey, and this adventure is no exception. By watching specially created Dragon Age: Inquisition videos and discovering hidden elements in them, you can unlock a bonus weapons pack to use in the game!
How does it work? Follow these steps below and you'll be well on your way!
1. Begin your quest at Dragon Age: Inquisition (http://quest.dragonage.com) from a desktop computer. Make sure that you're logged in to your Origin account. You'll need to do so to save your progress and acquire the weapons pack at the end.
2. From the quest home page, select Vivienne's character card to watch the first video in the series.
3. Now that you've watched the video, you're ready to move on to Vivenne's Inquest, where your skills of observation come into play. The keys at the bottom of the page represent the number of hidden elements you still have left to find.
4. Did you find one of the hidden elements? Awesome! You'll notice that one of the keys has turned into an image representing the item you've discovered. You can click on that item a little later on to revisit it.
5. Once you've found all three hidden elements, the Inquest is complete. However, your quest has only begun! To earn the Red Lyrium Reapers, you'll have to achieve the rank of Knight by unveiling all three companions and the Inquisitor.
6. After you've completed all three character Inquests, the final feat is unlocked: the Inquisitor!
7. Congratulations! Only the most powerful and cunning of leaders has made it this far. Can you complete the final Inquest? For each hidden element you find during this phase, you're one step closer to your boon.
8. Once you have completed this challenge, you will have earned the rank of Knight. We salute you, noble warrior!
9. To redeem your weapons pack, you will be prompted to log in to your Origin account. That's it! The Red Lyrium Reapers will be waiting for you in Dragon Age: Inquisition. Maker be with you.
Ready to give it a go? Click here to begin your quest!
Rewards
Blade of Tuhna -Item level 7-
193 DPS Unique Dagger
55 Damage
+20 Damage vs Living
+11% Damage to Barrier
+1% Heal on Kill
Corrupting Rune
Staff of Aidahn -Item level 7-
79 DPS Unique Staff
29 Electric Damage
+20 Damage vs Living
+20% Damage to Barrier
+2% Heal on Kill
Corrupting Rune
Sword of Charris -Item level 7-
107 DPS Unique Sword
76 Damage
+20 Damage vs Living
+11% Damage to Barrier
+2% Heal on Kill
Corrupting Rune
Empty Grip Slot
The Inquisitor's part kind of confused me at first. When that bar shows up you have to click and drag the video to go frame by frame until you find the weapons. Then you just click again and it unlocks it.