I love that talk. Raymond Hettinger is a gem. What I took from that is the implementation does preserve order but it isn't guaranteed yet and in theory it could change.
His talks are good, except that every time he asks a stupid rhetorical question of the audience I’m overwhelmed with the urge to wang¹ a tomato at him.
This talk is definitely worth a watch yes :)
> What I took from that is the implementation does preserve order but it isn't guaranteed yet and in theory it could change.
This was the case for python 3.6, but starting from Python 3.7 ordering is guaranteed [1]:
[1] https://docs.python.org/3.7/library/stdtypes.html#dict-views