Icloud video in quality even when choosing "download unmodified original"

Hello apple_avocado,

Thanks for choosing the Apple Support Communities. Different file sizes are expected depending on how you import the file and by what format to your PC. We have a few resources that will help you get the video from your iPhone to your PC.

Transfer photos and videos from your iPhone or iPad to your Mac or PC - Apple Support

This resource covers each way you can import. iCloud, and directly to your PC.

"Use iCloud Photos

iCloud Photos keeps your photos and videos safe, up to date, and available automatically on all of your Apple devices, on iCloud.com, and even your PC. When you use iCloud Photos, you don't need to import photos from one iCloud device to another. iCloud Photos always uploads and stores your original, full-resolution photos. You can keep full-resolution originals on each of your devices, or save space with device-optimized versions instead. Either way, you can download your originals whenever you need them. Any organizational changes or edits you make are always kept up to date across all your Apple devices. Learn how to set up and use iCloud Photos."

"Import to your Windows PC

You can import photos to your PC by connecting your device to your computer and using the Windows Photos app:

1. Update to the latest version of iTunes on your PC. Importing photos to your PC requires iTunes 12.5.1 or later.
2. Connect your iPhone or iPad to your PC with a USB cable.
3. If asked, unlock your iOS or iPadOS device using your passcode.
4. If you see a prompt on your iOS or iPadOS device asking you to Trust This Computer, tap Trust or Allow to continue.

Then, visit Microsoft's website to learn how to import photos to the Windows Photos app in Windows 10.

If you have iCloud Photos turned on, you need to download the original, full resolution versions of your photos to your iPhone or iPad before you import to your PC.

When you import videos from your iOS or iPadOS device to your PC, some might be rotated incorrectly in the Windows Photos app. You can add these videos to iTunes to play them in the correct orientation.

If you want to ensure photos from your iOS or iPadOS device have the best compatibility with Windows 10, try these steps:

1. On your iOS or iPadOS device, open the Settings app.
2. Tap Camera, then tap Formats.
3. Tap Most Compatible. From now on, your camera will create photos and videos in JPEG and H.264 formats.

More ways to transfer photos and videos to your computer

• Use AirDrop to quickly send photos and videos to your Mac.
• Import photos and video from storage media, like a hard disk or SD card, to Photos for macOS.
• Use a scanner and Image Capture to import photos that were taken with a film camera.
• Import your images directly to a folder on your Mac with Image Capture.
• Sync music, movies, and more from your iOS devices using your computer.
• Use Time Machine to back up all of your files, including your photos and videos, to an external hard drive."

We hope this helps.

Cheers!