As a test, I faded two videos together; the first being one with people in the room, which then faded to the second video where there was no one in the room, making it look like the people slowly disappeared. The fade worked perfectly, except the light on the ceiling of the room got brighter as the first video faded into the second, but returned to normal once the second video was fully faded in.

Any advice on preventing the light source from becomming brighter when fading together?

Any help would be appreciated

thanks