Wiiaboo
I may be missing something obvious here, but what's wrong with recording the full screen with dosbox running windowed (No modifications necessary)? That would effectively prevent the use of savestates or slowdowns without some extensive video editing which someone determined could pull off in any case.
Obviously this would be for verification purposes only, with the video being cropped for publishing.
Obviously this would be for verification purposes only, with the video being cropped for publishing.