Sending video or photos from iOS/iPadOS to another user with OneDrive

Click on "Photos and Videos"

 If the message below appears, click on "Allow access to all photos"

 The videos should appear in "Recents". If not, search through the photos and videos until you find the photos/videos you want to upload. Once you have selected all the videos you want to share, click "Done"

 The videos will upload to your OneDrive. The process may take a few minutes, depending on the size of the videos. Once the upload is complete, tap the three dots icon next to the video you want to share. Then select "Share".

 In the box that appears, type in the name or email of the person who you want to send the video to. Then click "Send"; that user will receive an email shortly with a link they can use to view and/or download the video to their computer.