Copy video file to iCloud of my friend Can I copy a video file to the iCloud of my friend from my MacBook ? Suppose I know the AppleId and the password.
When your freind has a mac or iOS device with airdrop, you can send it to him without any wires.

On your macbook you can use the share-button (square with arrow in it) to share the file. There should be numerious ways to share a video.

I think it is notossible to import a video directly to someones icloud unless it is enabled on your mac.