Heyo, I think for your instance. Go watch all the "hot videos" on Dtube. Look at what they have and the type of content that is being upvoted by dtube.

For you, try putting your phone on a small tripod. Get good natural light, maybe invest in a rode lavalier phone mic (normally quite cheap) and talk directly to the camera.

If you're moving around a lot without clarity, it gets distracting and ultimately people will click off the video.

Hope that helps!