potentialities

My father and my brother-in-law both work on oil rigs and they're usually on the rig for about 3 weeks at a time. The rule about DVDs/videos applies to broadcasting them in public areas - like one of the lounges which is generally filled by just about everyone who isn't working or sleeping. They would be able to, however, watch DVDs in the privacy of their own room provided they had their own DVD player/TV/computer (which is highly unlikely, 'cause the cabins tend to be a wee bit spartan), so yeah.