When Syrian government forces retook control of Rami al-Sayyed’s Damascus suburb in April, he and others who had supported opposition fighters faced a choice. “Either stay in regime areas and face the worst,” he said, “or leave and survive.”

And so, he recalled, “I arrived to Jandaris, a place I had never heard of before.”

Jandaris is the northern Syrian town near where Mr. Sayyed, an activist who uses a pseudonym for his own protection, lives in a makeshift refugee camp with thousands of others displaced by Syria’s seven-year civil war.

Mr. Sayyed — who documented in photographs and video the scenes in his neighborhood over the years as government barrel bombs fell, Islamist militias seized control and food supplies vanished — has taken camera in hand again. This time, he is providing a glimpse into the lives of some of the more than 6.6 million people displaced within Syria.

He was bused to Jandaris in April along with his brother, sister-in-law and their three young children after deciding to leave their suburb, Yarmouk, which itself had originally been established as a refugee camp for Palestinians fleeing the war over Israel’s founding.