I have never used any note-taking app. This might be a reason I find navigating through this app a bit overwhelming and confusing (Tier1). I saw a lot of people here also saying that they struggle with a steep learning curve.
Current Youtube videos are a bit generic, fast-paced and they might make sense for experienced note-taking app users. For the rest of us … I am not so sure.
Can you make 5-10 short videos (loom quality or similar)?
You can start from scratch (blank app) every time and focus on basic (first-time) users first.
If I may suggest: Take only one use-case as an example and build a short demo. If a single entry can be created within different app tabs, please explain why you choose to create it within some specific tab (give pros / cons). Then reset and cover another use case.
Maybe you could also schedule a webinar?