I loved your video! I have 2 TNs as planners with the weeklies and the horizontal layout. One is for work and the other for personal stuff. And I have a Midori Codex (just like yours, the one with the corner) for writing thoughts, ideas, and memories whenever I feel the need to. My Codex is very simple too, I put just a stamp with the date and I write in a bullet journal style. And that's it, basically. I started the year with many journals, but I was overwhelmed by March. It was very stressful to keep up with all of them every day. Now, I don't use any decorations, stickers or washy tape and I keep everything to minimum so they can serve me and not the other way around. And so far, it works great!
I'm using my Hobonichi Cousin like your A5 Hon. I found that it was best for me to add stickers to the spread ahead of time and then, add my thoughts about those days and doodles later on. It made it a lot easier for me to fill it in. I stopped feeling overwhelmed by the space.
I struggle with more than 1 journal and planner. I like the cousin, but I don't need the vertical weeklies. I'm in and out of my TNs because I love the coziness so much, but at the same time I think I prefer bound books. I think the new sterling ink daily is the perfect replacement because it's just monthlies and dailies and comes in b6 which is my favorite size. I just haven't gotten it yet. I'm currently in a b6 TN for planning, a cousin for journaling, I have a little a6 and an a5 common place kinda journal. It's too much. I can't keep up with all of it so trying to figure out what to cut/combine. Lovely video!!