I don't think anyone else will offer to give you a 100% refund like this. If you are a serious life-long basketball student like me, then you've probably bought several other books and videos for basketball drills and coaching. But have you ever been able to send these things back if you weren't happy with them?
Usually, once you open a video or DVD, you can't return it, unless there's something wrong with the tape or disc itself. But if you think there's something wrong with the content, it doesn't matter - you're stuck with it. At best, some companies only give you 30 days to try out their DVD's, videos, and books.
I don't want that to be a reason why you don't give this a try. That's why I'll give you at least six months.