The problem you might get is if someone lands on one of the videos in the middle or end of the sequence (via search or suggested videos list).
If that is a problem for you, to prevent that happening, you could make the first video in the course public and then make all the other videos unlisted (not private). You won't be able to put the unlisted videos in a playlist, but you could link to other videos in the sequence using one or many of the following techniques:
-links in the description
-links using cards
-links in the endscreen.
By only making the first video public, people searching or just idly browsing Youtube will always enter the course by the first part.[DOUBLEPOST=1490123777][/DOUBLEPOST]Update:
Having said that, 11 minutes isn't particularly long. If it were me, I'd upload it as 1 video and then link to the individual parts of the timeline in the description.
Example in the description:
0:05 Introduction
1:30 Part one title
3:50 Part two title
(When you write the timelines like that in the description, they will actually be clickable links that will allow the viewers to go straight to the relevant section)