Mimic lightning in Blender's video editing mode I want to do something that I think ought to be rather simple. I’m working in Blender’s video editing mode. What I want to do is simply to light up what is shown in the strip abruptly, mimicking the effect of lightning. I do not want the flashlight itself, just the indirect light of the flashlight in the room the person in the video is in.

hope someone can help
Blender VSE has a range of color effects you can apply on strips.
The simplest :


Select your strip
In the properties region > Filter, change the value of Multiply to change the bightness


Then you have modifiers:


In the Properties region > Modifiers > Add Strip Modifier, try :


White Balance
Bright/Contrast
Curves



Finally you have effect strips:


with your strip selected, hit shift+A (or click on "Add")
in Effect Strip, try :


Glow, then change its parameters in the properties region > Effect Strip
Color, then  set the blend mode to "Add" (in properties region > Edit Strip) and change the color in Effect Strip.