How to edit Multiple layers

[john_brown]

Yea i have 70 images by 1 frame, when put back together again it plays like a video, i just wanna remove most of the awkward background, that gimp struggles to remove. Like a black background but it also removes anything black, on the part of image i wanna keep. But i have to go thought every single one of them, cutting everything i don't want and then saving them Separately. So if i could remove the most awkward part's, i could just then use the fuzzy select tool on the rest. But thanks for the suggestions tho