This video starts off with the "Quick and Dirty" - The minimum you need to know about this video to progress through the course.
0:47 - This is where the introduction starts
1:45 - This is where the hands-on coding starts.
UPDATE (2021-03-03): At 8:40, I mention that PCollection variable assignment works with parentheses. It would have been more precise to say that when you are transforming data, it can span multiple lines, and when you span multiple lines, the parentheses are needed. This blog post discusses this issue in more detail.