We don't have any specific DVDs on this subject, but we do have access to hundreds of documentaries through streaming media, via the GU-Q Library website.
Click on 'Images & Audio Visual' on the left hand side of the search box on the library home page and this will take you to a new search box that includes access to Filmmaker's Library and Films on Demand.
Films on Demand has at least 2 documentaries relating to pearl diving (use the search terms 'pearl diving').