Maybe these are mostly too new, or you have different (more practical, hands on?) definition of tech-talk - but from a quick look the only speakers I expected - and found - were Sandi Mets and Rob Pike.
If it's practical, I'm surprised not to see the js "wat" lightning talk (which I now can't seem to find...).
If it's more general "best of", I'd expect something like Guy Steele "growing a language" :
https://youtu.be/_ahvzDzKdB0
Alan Kay "doing with images makes symbols":
https://youtu.be/p2LZLYcu_JY
Or, if that's too long, the much more condensed ted talk:
"a powerful idea about teaching ideas":
https://youtu.be/Eg_ToU7m1MI
(Maybe that's not a "tech talk"?)
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:
If it's practical, I'm surprised not to see the js "wat" lightning talk (which I now can't seem to find...).
If it's more general "best of", I'd expect something like Guy Steele "growing a language" : https://youtu.be/_ahvzDzKdB0
Douglas Engelbart "the mother of all demos": https://youtu.be/yJDv-zdhzMY
Alan Kay "doing with images makes symbols": https://youtu.be/p2LZLYcu_JY Or, if that's too long, the much more condensed ted talk: "a powerful idea about teaching ideas": https://youtu.be/Eg_ToU7m1MI (Maybe that's not a "tech talk"?)
Rich Hickey "simple made easy" : https://youtu.be/34_L7t7fD_U
To name a few of the top of my head.