I have a feature film in mp4 format. There is one scene where I just want to place a black censor box to conceal one part of the screen, no more than 7 seconds.
I'm a beginner, so my concern is that if I import the two-hour, 700MB file into, say, Windows Movie Maker, make the minor change, and then convert the finished product back into mp4, then the finished file will have a huge size that won't fit on a 4.7GB DVD.
Is that a valid concern? Are there video editing softwares out there that somewhat retain original file size?