Use AirDrop to send the video to another Apple device
Upload the video to iCloud Drive and share the link
Upload the video to Google Drive, Dropbox, or OneDrive and share the link
Use Messages if the video is small enough for attachment limits
Use Mail Drop in the Mail app for large video files
Compress the video before sending
Trim the video in Photos to make it shorter
Send the video through WhatsApp, Telegram, or similar apps
Transfer the video to a computer first, then share it from there