Since there's no rest between the sets, and such a high number of reps (52, if my math is correct, or even more for the supersets) I think technically it's an endurance workout. But as other posts have noted, it's a very flexible workout. It would be pretty easy to stop the workout for a rest period in between weight changes so that instead of doing, say, 52 reps for one giant set, you do a set of 12, rest, then a set of 10, rest, a set of 8, rest ... you get the idea. This would make it more technically similar to a hypertrophy/strength workout.
As mentioned above, it's an excellent workout regardless of how you classify it.