Motivation is a tricky thing. So much of youtube is marketing and you can find yourself drained of the resources it takes to actually make a video.
As someone who produces daily content, I can relate to struggles with motivation. Here are my tips:
1. Record when you feel like recording. Usually there will be at least one day a week I feel creative and chipper. I try to record all my videos for the week on that day, and edit throughout the rest of the week.
2. If I go through a slump where for whatever reason I'm not feeling inspired, I go back to recording the videos I love. They may not perform as well, but I find it inspires me again and helps me keep producing content.
3. Try as hard as you can not to focus on the numbers. I'm a sucker for this myself - I'm so inspired when my channel is growing because I thrive off it, but when it stagnates I find it harder to produce. Once again, my solution is to go back to the content I love, even if it doesn't perform as well.
I don't need to feel inspired to edit but I do need to feel inspired to record, so it's all about getting yourself in the right mind frame and once you're there, taking advantage of it for all it's worth.