Show HN: The Let's Code JavaScript Sampler (please critique)

I've recently put up a page of sample videos for my screencast, Let's Code: Test-Driven JavaScript. I'd love your feedback and critique. The page is here:

http://www.letscodejavascript.com/v3/sampler

(The plan is to link it as the "free" option on the subscribe page, but I haven't done that yet.)

I've talked about my experiences with Let's Code JavaScript here on HN before:

https://news.ycombinator.com/item?id=6433110

https://news.ycombinator.com/item?id=6038226