Yes, you can.
For detailed step-by-step instructions for each app, please refer to the manuals below.
*Note: Apps other than the Web Browser version cannot cut out the middle of a video and combine the parts before and after into a single video.
Web Browser
▼Remove section from video (Web Browser)
https://teachme.jp/8/manuals/14366649/
Mobile App (iOS/Android version)
▼Trim Registered Videos (Mobile App)
https://teachme.jp/8/manuals/42393698