Overlay/Layer with non-transparent clip

Hello! I very recently found myself dealing with a bad source and I sought to improve it by using the release from another region. The issue I have is that I would still very much like to maintain some of the captions from the the bad source. By example, I have two scenes that span the same length, the bad source has the title for the episode, the good source has nothing. So I would simply crop the bad source title as best I could and overlay it over the good source. Problem is the color scheme does not quite match. I'm looking to somehow rectify this issue but I'm kind of unsure how to darken/lighten the rest of the scene to match my title or how to properly select just the title without drawing a box (a mask of some sort?). Any help would be much appreciated.

Instead of trying to splice in the title in the video, you could just softsub the title. Pick a font you like (you don't even need to use a similar one!) and use Aegisub to typeset it. Remove the quotation marks while you're at it, since it's sort of ungrammatical to have them there.

@colours Really trying to recreate the original as this will be the only one-off episode that will require such this kind of surgery. @poisondeathray I'll look into that; I didn't think to look to the internal filters for this. Hopefully I can figure out the settings I need. Thanks! EDIT: The FadeIn effect that is already hardsubbed into the clip isn't quite working with this. I think what I'll need to do is photoshop one frame, span it the entire length, get the title, reinsert it using FadeIO with a white as the color then apply MaskHS. Ultimately your idea should pan out though.