Correct me if I'm wrong, but isn't momentum a well-known and fairly tried-and-tested strategy, and hasn't it greatly outperformed value over the past decade or two? Doesn't mean it will keep working forever, of course.
If that was true everyone would be doing it, and then the advantage would go away.
In short: if you think there's a "tried-and-tested strategy" that outperforms over anything but the short-term, then you either reject the efficient markets hypothesis--which would be pretty remarkable--or you don't understand it.
Careful on the investment lectures.