Connect your iPhone to your computer with a USB cable
Unlock your iPhone and tap Trust This Computer if prompted
On Windows, open File Explorer and go to Apple iPhone > Internal Storage > DCIM
Copy the video files from the DCIM folder to your computer
On Mac, open the Photos app and import the videos from your iPhone
On Mac, you can also use the Image Capture app to transfer videos
Use AirDrop on Mac to send videos wirelessly from iPhone to computer
Use iCloud Photos to sync videos to your computer
Use the iCloud website to download videos to your computer
Use third-party transfer apps if needed