This used to be out there but I can't find it so you'll just have to use your imagination....
They did a Foolin Yourself video that was clearly filmed the same time as Come Sail Away...
Typical concert video, edited song (loses points), and a bit too 70s looking, but a great song and I like that it captures them in their youngish days with the hair and bell bottoms. Arguably the "coolest" that DDY has looked.