How do I apply Image adjustments to ALL frames

Hi,

I am using Photoshop CC. I import a video to the timeline which is about 3 seconds in duration.

I then, on the first frame, use the selection tool to choose an area i'd like to either darken, lighten, blur etc.

Once that's complete, when I move the to the next frame of video, of course the image adjustment is not present.

How can I extend my initial selection's adjustments to ALL frames of the video.

I don't think i'd like to save the adjustments as a filter, moreover i'd like to simply reproduce the same effect to the same

selection area, but to all the remaining frames in the short clip.

thanks,

L