I definitely like the model, but I think $25/mo is too high, especially when compared to other sources of information. The $50 and $100 options made me chuckle a bit (sorry).
The Economist print edition comes at $15/mo. 30 days of New York Times, delivered in print is $29/mo. That's a lot more content than Mixergy. And you have similar similar sites like BigThink and the Stanford ECorner podcasts, which are free.
But I'd pay $5/mo, or better yet, $1 per video.