There are many ways to shorten an MP4 video. Here's how you can do it in Filmora:
Step 1: Import the MP4 video into a Filmora project.
Step 2. You can now shorten the MP4 video in different ways:
Way 1. Trim the MP4 video by dragging the clip edge
Way 2. Cut the MP4 video and delete the unwanted parts to shorten.
Way 3. Speed up MP4 video using Filmora's Speed ramping feature.
Step 3. Export the edited MP4 video.