Hey @ghhr, I would like to share with you a few tips that will help you boost the production quality of your videos by a lot.

Don't shake your mobile phone that much. Find a way to stabilize it. A selfie stick might come in handy for this.

Make an intro to use in your videos.

Pick up an video editing program and start learning it. (I can help you to some extent with this) - I don't know everything about it but I do know the basics that will help you a lot.

Throw in the vlogging aspect in your videos and film yourself. Talk to the camera, if you aren't shy of course :) If you are though, then it's something you should work on to overcome it.

Try to be better with each new video.

Step by step, you will climb to the top my friend!