The video above is the The Witcher 3 Wild Hunt Precious Cargo Secondary Quest Walkthrough and shows how to complete Precious Cargo, the quest featured in The Witcher III: Wild Hunt.
The video walkthrough covers the following objectives:
Find the little box the merchant mentioned.
Find where the cart left the road.
Find the cart.
Chase down the merchant.
Knock the merchant off his horse.
Defeat the bandits.
