The video above is the The Witcher 3 Wild Hunt The Nilfgaardian Connection Main Quest Walkthrough and shows how to complete The Nilfgaardian Connection, the quest featured in The Witcher III: Wild Hunt.
The video walkthrough covers the following objectives:
Go to the Inn at the Crossroads.
Look for Hendrik in the village of Heatherton.
Talk to the survivor and learn what happened in the village.