Well, I think it has nothing to do with Eye Adaptation.
Please watch the video preview. You can clearly see that it started from dark and slowly going into brighter picture (0-2 seconds)
Nothing special in the sequencer, just few shots added in it.
The thing is I don´t capture it as whole video sequence, but always capture shots as single output.
You can see there is no fade track added in the camera cuts, but still it is fading in every shot I do.
I guess there is some default setting for sequencer, but I couldn´t find anything.
