A direct way to transfer your videos from Mac to iPhone is, using iCloud. Once you copy a certain video to iCloud drive, you can access it from any of your Apple devices with the same Apple ID. iCloud is a cloud storage service alike other services like Google Drive, DropBox, SkyDrive, but with the advantage of being inbuilt in the later versions of Apple devices. You would find it easy to transfer your videos, once you go through the steps.
The steps are as follows:
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