Taking 20 shots of jager will do the trick (jk). btw would've been cool if there was an aftermath video (not sure if I missed it).
My motivation is seeing my channel grow. The more it grows, the more I know that I have something valuable in my hands and I'll be dumb to let it die out. Before my growth, I was always demotivated and even had a lapse of time where I didn't release any videos for 2 or so months. Then I remembered all the comments that were left in my older videos. Everyone enjoyed my content and wanted to see more. They believed that I had worthy content to watch. I used that as my motivation even to this day on top of channel growth. Most commentors are sincere when they tell you that your content is valuable. I made sure I didn't lose sight of that.