1. You should start here with the official Bullet Journal video. It's the best way to learn the basics of the system and to decide if the system is right for you.
2. Mariana's Study Corner has a video "10 Bullet Journal Hacks" which summarizes some common, but clever bullet journal hacks. I had seen some of these before being used, but not explained. This video cleared up a few "how"/"why" questions for me.
3. I love BuJo Boosted! BuJo Boosted has lots of really good ideas about design and layout, and he develops new more effective methods for tracking productivity. For example, here is his Checker Life Check video.
4. I also love Bujo Boosted's Ultimate Productivity challenge! It's a fun way to keep track of a larger project or set of goals. You can watch the video
5. And once again! Here's another awesome video on QUALITY tracking by BuJo Boosted. He's thoughts on quantity tracking vs. quality tracking vs. habitat tracking has played a huge role in my current BuJo layout.
6. Here's his video on quantity tracking. I promise that is the last Ricardo video! I can't help it, he's my favorite. :)
7. Everyone makes mistakes in their Bullet Journals, even those pros on YouTube and Instagram. AmandaRachLee gives some great tips for how to fix those mistakes in "How to Fix Your Bullet Journal Mistakes".
8. I like the perspective and the approach of Letter and Journal's "One Man's Bullet Journal". I enjoy the focus on functionality, and I love his guiding principles and tactics method.
9. Boho Berry has SO many wonderful videos on bullet journaling. I highly recommend taking a glance at her playlists and seeing if any look helpful...or just watching things straight through. I recommend watching one of her first flip-throughs to get a sense of everything that is in one person's journal.
10. I also like That Kind of Thing's "Starting a Bullet Journal" as she gives an honest behind-the-scenes look at mistakes, and makes a point about not getting it perfect.