As for #3 in your list, we offer a feature where coder A can say, "Hey, coder B, you're item X is blocking my item Y!" When coder B finishes item X, coder A is alerted via email that coder B has unblocked them.
The original comment is correct though in that the video just talks about features, it doesn't tell a story or focus on how it would be used to build a product.
Even though I'm familiar with pivotal/ticketing systems, I still wanted to be sold on what it does not just on how it does it.
