At 36:30 somebody asked the question about how do you automate code review and he says that you need to start from the idea that he should figure out where you're spending your time and look for ways to spend less time on that
At 37:10 they realize they were spending a lot of time on merge conflicts. One reason was that they were working on the same code a lot, so that was one of the pushes to tree out the code so there would be greater locality of change.
Add 37:20 the reason why another reason why they were merge conflicts is because PR's stayed open too long. And that's because they required code review so they were waiting on people.