Another trick: if you have taxonomies, pre-built categories or any special things you want to seed into your database when you start a new project, you can read from a JSON file then run a foreach loop in a seeder. You can also verify for the existence of the model rows before actually create it. Useful for seeding countries, languages, topics or some other stuff like that.
Thanks for that video, man! Maybe good for a follow-up video: seeding 10 users and then for each user ... random 1 through 5 comments. $users = (all 10 users)->each->closure->(using extra variables)