To create a new video project, open VivaCut, tap on 'New Project', select the video clips you want to include, and then tap 'Next'. You'll be taken to the editing interface where you can start editing your video.

VivaCut offers a variety of editing tools including video cutting, merging, text overlays, transitions, effects, and audio editing. You can use these tools to customize your video according to your preferences.

To add music, navigate to the 'Audio' section in the editing interface. From there, you can choose to add music from the app’s library or import your own audio files to sync with your video.

To export your video, tap on the export button located at the top right corner. Choose your preferred resolution and frame rate, then tap 'Export'. The video will be processed and saved to your device.

To use advanced features like layers and keyframe animation, follow these steps:
1. Start a new project and add your video clips.
2. Select the clip you want to animate.
3. Tap on the 'Animation' option and choose 'Keyframe'.
4. Adjust the properties at different points in the timeline to create your desired animation effect. This allows for more dynamic video edits.