'crewai install'

In Matthew Berman’s latest video on CrewAI, after doing ‘pip install crewai’ he then subsequently issues a ‘crewai install’ command. Thiough I don’t see it documented on the doc site it definitely does something in his video, i have linked to that part here:

https://www.youtube.com/watch?v=twzgEBabOBk&t=268s

Can anyone tell me what it is supposed to achieve?