If you don't manage link setting, some email address may not be able to open the link you shared.
1. After you upload the files/videos you want to share. Select the files and click share.
2. On Send Link, Click on the option down below that will take you to link setting.
3. Click on Link Setting and check specific people.
4. On address bar. Enter the email address of the person you want to share the link.
Animated GIF: Walkthrough Video for Mobile Users (Microsoft) :