How to make a video appear clear on the large screen?

Is there a software that can make your video have a green screen?

• I'm not sure if you understand my question, but what I'm having difficulty with is that i am completing a video project for my history class. Anyhow, i need to change the background and i don't know how. I don't want to redo it, so i went on Google and searched for a way to change my background in the video. What i got was a whole bunch of stuff about green screen. The only problem is i didn't cam-record my so called 'movie' on a green screen. Now I'm wondering, is there a software that can just automatically just change the background in my video into a green screen back ground? or is there another way? please help!! i really do want to learn.

• Answer:

  No. Re-record using a green screen. Or open up photoshop and edit each frame individually adding in a green background where needed.