How can I reference an insight taught in Cousera's Lecture?
A citation like that would be fine, although I wouldn't include 'Technical Report'.  Some citation styles have formats for lectures or other presentations.

However, the Coursera lecture may not be the best thing to cite.


Does the instructor communicate the insight in writing somewhere? For example, in a paper or in published lecture notes for an in-person course?
Does the instructor provide a source for the insights? In which case you may want to cite that. The source may be indicated in supplementary readings or lecture notes.
Do you need to cite it? When in doubt, you should always cite, but you often don't need to cite things that you would ordinarily learn in a class on the subject. The line for this one is pretty fuzzy and nuanced, though, and it depends on how cutting-edge the insight is.


I would not let the ephemerality of Coursera stop you from citing it, but if you can find a better citation you should use it. It is better to cite something that disappears than to not cite.