How to Stand-up paddle more efficiently on your board

Stand-up paddling is sort of a niche spinoff of surfing in which the rider stands up on their board and moves across flat water by paddling. This quick video from an expert in the field offers some tips for improving the efficiency of your stroke when stand-up paddling. You'll be able to paddle faster and longer without tiring. How could that not make stand-up paddling more enjoyable?