To compress a video without its audio using the Video & Movie compressor's custom compression method, follow these steps:

1. Tap the 'PICK A VIDEO' button on the app's home page.

2. Select the video you want to compress.

3. Tap the 'Custom' button.

4. On the video playback screen top-right corner, toggle the audio on and off button by tapping it.

5. Tap the 'START' button to begin the compression process.