how do I download a video from cloud to my iphone?

Hi beansta60,

Thank you for using the Apple Support Communities! To download a video from iCloud to your iPhone, you'll want to follow the steps from the article below:

Download iCloud photos and videos

Specifically:

On your iPhone, iPad, or iPod touch

1. On iCloud.com, tap Photos.

2. Tap Select, then tap a photo or video. To select multiple photos or videos, tap more than one. To select your entire library, tap Select All.

3. Tap the more button .

4. Choose Download, then tap Download to confirm.

Hope this helps!

Have a great day.