Replacing a Media Center Asset
If you need to update your media file or link, you can simply update the Media Asset. All existing trackable links will point to the new asset.
Go to Content > Media
Select the correct tab (My Media or Shared Media, depending on whether you or someone else created it)
Click on the Gear/Cog icon next to the Media
In the section "Replace this media with a new file?", upload a file or add a new link
Click Save Media at the bottom right