The content guidelines specifically state profanity is okay as long as it's not excessive. 3 seconds of fuck in a 78 minute video is not excessive. More import

The content guidelines specifically state profanity is okay as long as it's not excessive. 3 seconds of fuck in a 78 minute video is not excessive. More importantly, while he could use youtube's tools to remove the profanity, it doesn't matter because they've also flagged it for Sex and Nudity.