Daryn Hinton, who shared this YouTube video, explains:

Ross Kananga who did the stunt of running across the crocodile backs in the James Bond movie 'Live and let Die' was a friend of my brother Darby Hinton & I (Daryn Hinton). Wow he almost got killed a couple of times! Ross was a great guy!!!! Mark Trenchard whose mom was the production manager's secretary in Jamaica posted it to show us.

And, of course, you can watch the final shot in the completed film from 1973. It's one of my favorite 007 movies. (Thanks, Joe Sabia!)