You're right those are all great talks (and fit in my definition of a tech talk). I just checked, and none of them are in my dataset, which I'll admit I'm surprised about. But they (and related ones) will make it into the next round.
The issue seems to be that they are not typically watched on youtube. For example, the "simple made easy" linked above is a low-quality pirate youtube copy, the proper place to watch it is here:
