Connect the iPhone to the computer with a USB cable
Unlock the iPhone and tap Trust This Computer if prompted
Open Photos on Mac and import the videos
Open File Explorer on Windows and access the iPhone under This PC
Go to Internal Storage, then DCIM, and copy the videos
Use the Photos app on Windows to import from the connected iPhone
Use AirDrop on Mac to send videos wirelessly
Use iCloud Photos to sync videos to the computer
Use iCloud Drive to upload videos from the iPhone and download them on the computer
Use email or messaging apps for small video files
Use third-party transfer apps or cloud storage services
Select the videos on the iPhone and share them to the chosen transfer method