Of all the things about Xtube that inspire our righteous indignation (i.e. sexual frustration) it's that most of its clips are either too short to bother with or 20 minutes of plain masturbation. These guys must feel our pain.
Because more than anything else—the size of the muscles, the intensity of the pounding, or the believability of the dirty talk—the most important thing about pornography is whether or not you can get off to it. Even ten minutes of mediocre sex is better than a 15-second clip of stellar sex, but still, it's a good thing the sex in this video isn't mediocre.