Near the beginning of the video [https://dojofordrones.com/topic/ardupilot-installation-part-1/] at 1:00 Caleb states there have been issues using “git submodule update --init --recursive” and suggests using "git clone -b Copter-4.5.7 --recursive https: //github.com/ardupilot/ardupilot " instead. (Yet later at 2:00 he does use the old command.)
I tried running the ‘old method’ myself and did not have any issues with the install. But like he mentions elsewhere, there might be differences in user experiences depending on their own system configuration. I was able to continue to successfully install the code without any issue.
I am unable to see where there is a jump in the video or missing lines. Perhaps if you direct me to the link and time I can take a look.
Let me know if you are not able to complete the install or have any other questions.
Jack
Additional references:
https://community.dojofordrones.com/t/git-submodule-update-init-recursive/1003
https://community.dojofordrones.com/t/failed-for-submodule-update-init-recursive/947